Mabell cell phone jammer company provides customers with high-quality

Conductive pads is to reduce the joint or joints of the tank, holes or gaps, so that RF radiation is not distributed out. EMI gasket is a conductive medium, used to fill gaps within the shield and provide continuous low impedance contacts, usually in the EMI gasket between the two conductors to provide a flexible connection, so the current spread on a conductor to another conductor. EMI gasket can refer to the choice of the following performance parameters: the specific frequency range shielding efficiency. adhesion method and seal strength with the current housing environment compatibility and external corrosion resistance.Mabell cell phone jammer company provides customers with high-quality, efficient and intelligent security products. Most commercial pads have sufficient shielding to enable equipment to meet EMC standards, the key is properly within the shield design of the gasket. gasket system: a key factor to consider is compressed, the compression gasket in between the liner and high conductivity. liner and poor conductivity between the gasket will reduce the shielding efficiency the other joints occur if the less a slot antenna formed by the slit, the radiation wavelength smaller than the gap length of about 4 times to ensure continuity gasket surface first to ensure a smooth, clean, and by the need to address in order to have good electrical conductivity, these surfaces must be covered before the engagement; other shielding gasket material gasket has continued for such a good adhesion is also very important characteristics of conductive pads of the compressible gasket can make up any irregularities.Mabell cell phone blocker company provides customers with solution and technical support for application service. All pads have a minimum contact resistance and effective work, designers can increase the compression strength of the cushioning pads to reduce the number of the contact resistance, of course, this will increase the sealing strength, will become more curved shield Most compression to the original thickness of the liner in 30% to 70% results were better, so in the proposed minimum contact surface within the concave point between the two opposite pressure should be sufficient to ensure that the gasket between the liner and has good electrical conductivity on the other hand, the pressure on the pad should not be so large that the liner is non-normal compression state, because at this time will result in contact with liner failure, and may produce electromagnetic leakage with the gasket separation requirements.Therefore, Mabell cell phone jammer  has become valuable and reliable partner to customers. For the control pad compression is very important to the manufacturer's recommended range, this design needs to ensure sufficient hardness gasket to avoid large bend between the washer fasteners in some cases, may need some tightening firmware to prevent the shell structure bending rotation junction compression is an important feature, such as location of the door or flapper and if liner easy to compress, then the shielding performance with each rotation of the door down, this time lining pad needs to achieve higher compression force and the new gasket shielding performance of the same in most cases this is unlikely to do so requires a long-term solution for EMI if the shield or gasket coated with a conductive layer by the plastic, then add an EMI gasket will not have too many problems, but the designer must consider many in the conductive pads on the surface, there will be wear and tear, the coating surface of the metal backing is usually easier to wear. grow over time, this wear and tear will reduce the shielding efficiency of the junction liner, and the manufacturer to back trouble.Mabell cell phone jammer  company provides the OEM and ODM service to customers.

Cell phone blocker has the side application range

Laser beam through an optical system (such as a lens to focus the laser beam through a small area such as a lens optical system) focused to a small area, such as lens focus to a small area with high brightness .
In laser applications, Nd: YAG laser communication (3-12 road), He-Ne laser communications, single / three-way communication in the communication semiconductor laser experiment has been successful; Nd: YAG laser scalpel, CO2 laser scalpel laser iridectomy instrument, such as medical equipment has also been put into use; laser holography, holographic optical bomb in the plane in the application of pulsed laser holography and dynamic Raman spectrophotometer has become a new means of measurement science; CNC laser cutting machine , laser collimator, laser isotope separation of sulfur, liquid lasers for agricultural research, large-screen navigation displays the results obtained are also industrial and agricultural applications. cell phone jammer constantly sends channel frequency of the mobile phone to ensure the safety and confidentiality at site. March 1978 meeting of the National Science Conference, laser rewarded with nearly 80 projects, of which about 70 civilian, military about 10, reflecting the integrated development of laser technology in China during this period results. Chinese Academy of Sciences' 2000 report on high-tech development, "China's military development of free electron laser weapon's" fast track "program in four phases: the end of 2003, transmitting power from the free-electron lasers increased to ** W ** W; 2005 to 2006, emission free-electron laser weapons power increased to ** W; 2007 to 2009, will ** watt free-electron laser weapon device miniaturization, further targeting command and control and ability to experiment and evaluation; cell phone jammer can ensure the safety and confidentiality in the workshop.2010-2012, may demonstrate *** adjustable full spectrum of threats against the free-electron laser weapon systems, and in a few years to install it ships.

Ordinary light emitted light contains a wide wavelength range, that is, the line width W, the light emitted by ordinary light sources contain a wide wavelength range, spectral width is wide, such as sunlight contains all wavelengths of visible light on, and the laser single wavelength, sunlight contains all wavelengths of visible light on, and a single laser wavelength, extremely narrow spectral width, usually several hundred nanometers to several microns, compared with ordinary light, very narrow, usually several hundred nanometers to several microns, Compared with ordinary light, narrow spectral line width of several orders of magnitude. Several orders of magnitude narrower. cell phone blocker has the side application range.Ordinary light emitted light is incoherent, no interference, the light emitted by an ordinary light source is non-coherent light, does not produce interference, and have a good coherence properties of the laser. Laser beam superimposed, the amplitude is stable. Good coherence properties. Laser beam superimposed, the amplitude is stable. Quite a long time, can maintain the same light before and after the phase relationship, which is a long time when any other, can maintain the same light before and after the phase relationship, the reach of light. The reach of light. Ordinary light emission of light fired four, there has been no direction, normal light emission of light fired four, there has been no direction, a large beam divergence, and laser divergence angle is small, typically a few milli- curvature, directional Ye Hao, degree, and the laser divergence angle is small, typically a few milliradians, Ye Hao direction, such as a laser beam fired at the moon, the moon's surface in the spot diameter of less than 2km.cell phone jammer is of good electromagnetic compatibility.  The laser beam fired at the moon, the moon's surface in the beam diameter does not exceed.

Cell phone blocker can make the cell phone unavailable for calling

Drawback is that installation requires a certain structure, and this must be considered early in the design. As the work of modern electronic equipment more frequently to deal with the increasing frequency of electromagnetic interference, so interference filters installed on the panel to become a trend. A use is very convenient, very superior performance of the device is filtered connectors. Filter connector shape and general appearance the same connector can be directly replaced. It's on each pin or hole has a low-pass filter. Low-pass filter can be simple single-capacitor circuit, it can be more complex circuits. Solve the interference on the cable of a very simple way is to set the cable on a ferrite bead, although this method is often effective, but there are a number of conditions. cell phone jammer can prevent using of cell phone from making the noise in the meeting. Many people placed high expectations on the ferrite, as long as a cable radiation encountered problems on the set of ferrite on the cable, are often disappointed. The effect of ferrite bead prediction equation is: to improve common-mode radiation = 20lg (plus common-mode magnetic loop impedance after / plus magnetic loop before the common-mode impedance) For example, if the time did not increase the ferrite common-mode loop impedance of 100Ω, after the addition of ferrite is 1000Ω, the common-mode radiation improve 20dB. Note: sometimes put ferrite, the electromagnetic radiation is not significantly improved, this is not necessarily ferrite does not work, but may be in addition to this cable, there are other sources.  cell phone jammer can make the theater and church quiet. Use a ferrite bead on the cable, pay attention to the following questions:  magnetic bead as small as the diameter of the wall as thick as long as possible magnetic bead should be installed at the cable ends from: Today, electronic intelligent building electrical protection and grounding [Zhuantie] Abstract In this paper, several power grounding system overview, filter out the power supply suitable for intelligent building grounding system, and they should take all kinds of grounding in a relatively detailed description and analysis of intelligent buildings should be taken to protect the electrical grounding method is proposed with appropriate recommendations. Key words load balancing potential reference point TN-S single-point grounding anti-static grounding uniform grounding in the design of buildings for power distribution, grounding system design plays an important role, as it relates to the power supply system reliability, safety of. cell phone blocker can make the cell phone unavailable for calling or being called.  No matter what kind of building, in the total supply includes the design of grounding system design. Moreover, with the building requirements are different, different functions of various equipment, grounding systems accordingly different. In particular, after the 1990s, the emergence of a large number of intelligent building design of the grounding system a lot of new content. Common ground in several ways, which can be suitable for intelligent buildings? Let us analyze the following types of grounding systems. System is called the three-phase four-wire system, neutral and protective earth PE combined N, known as the PEN line. Although this grounding system with high sensitivity for ground faults, line economy is simple, but is only suitable for three-phase load more balanced place. cell phone jammer can stop students from texting during the class. Intelligent building, a larger proportion of single-phase load, it is difficult to achieve three-phase load balancing, PE N-wire line with the current imbalance due to the presence of fluorescent lights, thyristor (SCR) and other equipment caused by high harmonic currents in the non-failure cases, superimposed on the neutral line N, the neutral line N voltage fluctuations, and the current is varying very unstable, resulting in an unstable neutral point grounding potential drift.

It is the wide-channel blocker cell phone blocker for car remote control

To fully understand the Chinese mobile cell phonemarket, should not ignore this part. CCID Consulting released in August this year, China's "black phone" market research report, said that in 2006 China's black mobile cell phonesales over 35 million. The industry generally believe that these phones should be in 2007, 50 million or more. "China Electronics News" reporter who went to Shenzhen Huaqiang North, specifically the investigation, resident in Shenzhen, China Mobile Communications Association League Secretary General Sun Wenping cell phonedealer told reporters. A new unit ofcell phone jammerhas been developed for the commercial 3G cell phone jammer.
"Shenzhen Huaqiang North, the average daily sent to mobile phones around the world almost 20 million units, throughout the year, 60 million ~ 70 million." Of course, a major feature of these phones is very difficult to statistics, there is no institution can provide accurate data. "China Electronics News" forecast, although the mobile cell phonemarket this year, Huaqiang North, outside sales increase, a conservative estimate is that more than half the domestic market to digest, with formal channels of more than 150 million shipments this year, China's market capacity of at least 1.8 over 100 million. End of the hard statistics, "China Electronics News" reporter asked about the mobile cell phonechip suppliers, especially several major domestic mobile cell phonechip supplier. cell phone jammerhas the good cooling system with wind slots in both sides.
It is the wide-channel blocker cell phone blocker for car remote control.
With the "mobile cell phoneto the countryside", "Village Connected Project," the further implementation of the mobile cell phonedemand will be greater. In addition, the mobile cell phonemarket in 2008 and the Olympic economy will be driven by 3G, the replacement will therefore promote a large number of users. For the mobile cell phoneindustry participants, as long as the down-to do their own thing, to do good quality products to do to ensure efficient flow of logistics efficiency, will have their own living space. Brand: acceleration of domestic mobile cell phonemarket reshuffle persist for the win. Chinese mobile cell phonemarket to issue a total of more than 90 sheets of mobile cell phonelicenses, the brand on the market more than 80, caused such a large team competition can be imagined. The moment cell phone jammerstops being used, the cell cell phonecan recover the use and provide the full service.
In 2006, the pattern of China's mobile cell phonemarket to sum up, the "China Electronics News" has said that the two giants Nokia and Motorola to dominant market share (over 30% of Nokia, Motorola, more than 20%) formed the first Chinese mobile cell phonemarket one tier, and that more than half of the two. In 2007, this situation has changed, the performance of the Nokia still climbing higher and higher share from 31% up to 35% share, its competitors and reasons of their own Motorola is falling instead of rising, fell below 20% and to explore 15 percent. The General Manager had a very enjoyable dinner together with the client after visiting the cell phone jammerworkshop.

The cell phone blocker helps to protect your track privacy

High-frequency transformer: As technology advances, high-frequency power supply has a large number of applications being developed high-frequency power supply, because the traditional efficiency is not high-frequency power from the electromagnetic induction principle is not difficult to launch, can be transmitted by the transformer core power and magnetic flux is proportional to the frequency of changes, so if we raise the operating frequency of the transformer, then the transformer core can significantly reduce the size, weight, and improve power efficiency and reduce various losses, so, since the seventy years, the development of very fast high-frequency power, but on the other hand, increased frequency transformer core iron loss will lead to a sharp increase.Strictly prohibit to use the  cell phone jammer  to do criminal offence. To solve this problem, first reduce the magnetic core of the work a sense, the second is the use of better soft magnetic material, usually, high silicon steel transformer core can no longer use, but use a smaller loss of iron-nickel alloy (permalloy), ferrite or amorphous alloy filter inductors, chokes and the reactor: the power supply and switching power supply, transistor rectifier in order to eliminate the enormous ripple, to get a smooth DC output and the use of the device. We know that the inductor is an alternating current through the solenoid coil (which can contain iron core) due to the coil in the power of the moment will produce induced voltage, and the induced voltage is the reverse current through the resistance to the formation of magnetic flux, so the inductor current to change the device there is an impediment, it can not be passed, this called the inductive reactance. The  cell phone jammer could effectively prevent from being stalked by GPS satellite positioning.The number of changes in communications faster, the greater the inductance, so the inductor device is characterized by the higher frequency signal, the device, the stronger the signal is hindered if the inductor through on a DC signal, then device does not obstruct the signal. inductance device for use in inhibiting AC power, install the circuit after the rectifier, you can block the AC signal, and let the DC signal, if the AC signal is filtered out, so the inductor ( or a combination of inductors and other components), also known as the filter, because the inductor core work in the DC superimposed state, so the core not only to withstand the AC signal of magnetization, but also the DC current of magnetization (called Bias) The  cell phone jammer  could effectively interfere GPS satellite signals.At this time, we must have a high permeability core rate, used to generate inductance, in order to prevent the passage of AC signals, but also to prevent the DC magnetic bias signal lead core is magnetized to saturation in order to do this , frequently used means is to cut core, this could make a larger DC current magnetic core is not saturated. The other is the use of powder to do the core. powdered soft magnetic core material is generally used the powder and binder , pressed into the insulator due to the bonding agent between the powder particles and insulating agent isolated, although the core is suppressed into a whole, but in fact the magnetic circuit is disconnected, as if the core of the the way a lot of small magnetic open incision, by doing so prevents the magnetic core is saturated. I.-aided design CAD software on the network analyzer designed for high-frequency circuit.The  cell phone blocker helps to protect your track privacy.

People have adjusted the set of cell phone jammer already

The core material of the magnetic field lines along a direction adopted, if appropriate cutting silicon steel, and then wound into the core, making the circumference direction of the core happens to be the best direction of the magnetic properties of silicon, then the core of the magnetic permeability will be high, easy magnetization, the energy loss small, and ultimately improve the efficiency of the transformer. China is the number of silicon steel:And people have adjusted the set of cell phone jammer already. Hot-rolled silicon steel sheet D (3.1% silicon, such as D31 refers to the hot-rolled silicon steel); cold-rolled silicon steel DT; oriented silicon steel with high magnetic induction Q and QG These magnetic materials can be related to books and manuals to be. permalloy: permalloy refers to iron-nickel alloy, nickel content of its wide range, between 35% -90%. permalloy most prominent feature is a weak magnetic field with high permeability. their saturation magnetic flux density is generally 0.6 - 1.0T between the most simple permalloy is composed of two elements iron and nickel alloys, rolling and heat treatment through appropriate So do not use the cell phone jammer mutually. They can have high permeability, but also can be reasonably content with the iron and nickel, to obtain a relatively high saturation magnetic induction, but this low resistance of permalloy, good mechanical properties, so not many practical applications At present a large number of applications of permalloy is based on the iron-nickel add some other elements, such as molybdenum, copper, etc. The purpose is to add these elements to increase the resistivity to reduce eddy current losses after core made of. At the same time, add elements can also increase the hardness of the material, which is especially useful as the head, which are worn applications. Permalloy production process is relatively complex, for example, plate rolling process, the annealing temperature, time, speed of cooling after annealing and so the final magnetic properties of materials has great influence.cell phone jammer could be used for public security. permalloy our grades are 1JXX. which, J said, "Precision Alloy", "1" soft, the latter figure number, usually expressed in the alloy nickel content, such as 1J50, 1J851, etc. permalloy with high permeability, so often used in high-frequency transformer core or have strict requirements on the sensitivity of the device, such as high-frequency (tens of KHz) switching power supply transformer , precision transformer, transformer leakage switch, magnetic shielding, magnetic yoke and so on. Electromagnetic compatibility of electronic equipment or system is one of the main performance, electromagnetic compatibility equipment or system design is to achieve the required functionality, so that system performance into full play an important guarantee must be in the device or system functional design, while the electromagnetic compatibility design Electromagnetic compatibility is designed to enable the design of electronic equipment or systems in the expected electromagnetic environment to achieve electromagnetic compatibility. cell phone blocker could be applied in anti-terrorism.The requirement is to make electronic equipment or system to meet the requirements of EMC standards and the ability to have two aspects: 1. can be expected electromagnetic environment to work, without performance degradation or failure; 2 on the electromagnetic environment is not a source of pollution. as a realization of electromagnetic compatibility, must examine the following five questions: First, for the study of electromagnetic interference sources, including electromagnetic disturbance the source of the frequency domain and time domain, resulting in the inhibition mechanism and measures of the study.

Domestic cell phone blocker has a huge advantage in terms of price

Changing social factors affect the community's demand for business products or services, but also change the firm's strategic choice. With the change in consumer values, and higher demands on the quality of life, consumers not only focus on the quality of the phone, but also in the phone's appearance, texture, and the pursuit of entertainment on demand more attention. How to cater to the tastes of consumers is a major problem. Competitive analysis of China's mobile cell phoneindustry is currently China's mobile cell phonesales than have negative growth. Cell phonecapacity oversupply situation will continue. First ten months of 2004 production of 137 million mobile cell phoneunits, an increase of 49%, while adding less than 50 million mobile cell phoneusers. GSM signal will be jammed by cell phone jammer.
Total sales of the top ten mobile cell phonemanufacturers are Nokia, Motorola, Siemens, Bird, TCL, Ericsson, Samsung, Konka, Amoi and Philips. Domestic mobile cell phonemanufacturers due to technical, financial, size limitations, not to the Board on behalf of foreign handset makers to bring the impact, and only rely on its localization, low prices to win market share. Industry to increase the threat of new entrants. Market, the brand more and more Chinese and foreign brands in China's huge consumption, have plants in China. The degree of competition between existing competitors intensified. Foreign mobile cell phonewith its quality advantage occupy a significant market share, according to the price advantage of domestic mobile cell phonealso occupied half of the country. cell phone jammer can shield SCDMA signal.
Increased threat of substitute products. Increase in the number of PHS users with mobile cell phoneusers increased competition in the market. Strengthen the bargaining power buyers. Consumer information on the mobile cell phonemarket to improve the understanding of bargaining power. Supplier bargaining power. Influenced the development of core technology provider of supply quality. Analysis of the advantages of China's mobile cell phoneindustry. Domestic cell phone blocker has a huge advantage in terms of price. Its low-price strategy to meet a number of consumer psychology. But the pursuit of affordable consumer products. The market did not sell things, not only the price of things. cell phone jammer will jam PCS signal.
Mobile cell phonemanufacturers should work hard at this point. The price competitiveness of domestic mobile cell phonealthough threatening, but does not have long-term nature. Domestic mobile cell phonefrom a foreign mobile cell phonebrands to truly laid down out of the shadow price advantage alone is not enough. Domestic and foreign mobile cell phonemanufacturers and service companies in the channel there is a clear difference even advantage. Quality is a prerequisite. Price is based on the service like a business logistics. Domestic mobile cell phonedirectly from the business model is to shop from home appliances distribution channel sales model of evolution, and foreign mobile cell phoneis the level distribution model. This makes the domestic mobile cell phonemanufacturers have greater profit margins. cell phone jammer is sometimes used in the court.
China's mobile cell phoneindustry, the main problem analysis. High technical risk, the domestic mobile cell phonemanufacturers, high-end cell phonecan save the Council, can glory, the market is still full of variables. Inventory problem, in 2003, the domestic demand of only 60 million, with total exports, the total will not exceed 200 million, while the stock has reached 20 million. According to this view, the domestic mobile cell phoneis significantly higher inventory, excess production. Restrictions on exports, domestic exports of mobile phones there is a big constraint. Although TCL, Bird and other domestic mobile cell phonemanufacturers are actively developing overseas market, but exports are still very weak. cell phone jammeronly shields cell cell phonesignal.

Cell phone blocker enhances safety of oil field and oil depot

This is why many black phones are the most important reason to use MTK (see entry: MTK). So are other manufacturers of domestic mobile cell phoneis also very easy to fake, no matter the appearance or function can do almost the same. In addition to counterfeit, the more or OEM machine. OEM cell phone jammer industry, specifically did not get the MII mobile cell phoneproduction license, but very wanted cell phone manufacturers, merchants, and through the purchase of licenses for the production of the manufacturers already get hands goes "brand" to market behavior . OEM Party (the right side to purchase a license to use), there may be lines, may not have the production line; OEM B (right side lease license to use), perhaps for the Party OEM, the license may only lease the right to use. cell phone jammer will be used in the area where using cell cell phone is not allowed.
It is said that the first OEM market is 80 to 100 yuan each, followed all the way to bearish, as low as the current 20 yuan each. (See entry: OEM machine) out of this cell phoneOEM, also known as five yards. There is also a national regulation, with the release, many of the cottage manufacturers have "repented", launched its own brand. In fact, with the motherboard or MTK, produced by the cell cell phoneis also known as five yards. Appearance is usually associated with some well-known popular brands and similar products, and no more formal brand, and even some name Sunyericcsun, NOKIR, SAMSING this edge ball brand. These phones are usually called cottage. cell phone blocker enhances safety of oil field and oil depot.
Flagrant violation of state law than the smuggling and shoddy cell cell phonere furbished mobile phones, the cottage so it seems a little more self-sustaining backbone. Model is characterized by mostly based on MTK mobile platform, the bottom of the screen has five icons, handwriting, voice tones large, battery nominal (note, this is nominal, the black cell cell phonebattery actual capacity is usually a nominal 1 / 4) not less than 1800 mAh. Country cottage dates back to the brand-name marked with CECT cell phones, but the actual payment or fraudulent use of CECT brand CECT some cash to get the right to use. Subsequent emergence of a variety of brands. cell phone jammeruses the ultra-high frequency.
Work varies greatly, no branding, front or back of the common body greatly BLUETOOTH, TOUCHSCREEN, MP4 and so forth. What dare printed on the box, in addition to their real site. In recent years, active in all major TV shopping had never heard of the vast majority of mobile cell phonebrands are the cottage, bring a big moneymaker for the TV shopping. The cell phonefeatures an extremely rich, extremely low price, appearance is extremely innovative, quality is extremely unreliable. In any case, the "cottage phone" always beat the wisdom of our most frustrating piece of nerve, but also to some lack of innovative spirit of the domestic brands shame. cell phone jammer can continuously work for 12 hours.
Over the years, mobile cell phonefirms among the world there were many unmatched technological innovation, the appearance of innovation, process innovation, a lot of strange technology and design are combined together, these combinations may sometimes be infringement, but to achieve a wide variety of functions. Now, the cottage has become a non-mainstream cell phoneculture, wolf, and innovation, the spirit of the cottage to meet the market impact of an increasing number of people. With the liberalization of national regulators, many of the cottage manufacturers have "repented", launched its own brand. Open Category: mobile phones. A new workshop ofcell phone jammeris under the construction.

The company strengthens research of cell phone jammer

Fixed telecell phonelines penetration rate of 13.9%, mobile cell phone penetration rate reached 11.3%, more than 30 million Internet users. Last year, China has replaced the U.S. as the world's largest mobile cell phone market, but also a few still maintained a high growth one of the major mobile cell phone market. However, China's telecommunications industry has begun to enter the marginal profit. From China Telecom, China Mobile and other telecom companies by China Unicom, CRC and other rising star challenge began, the subject of multi-polarization telecommunications operators in China communication industry to break the state monopoly, competition pattern has been formed. The company strengthens research of cell phone jammer.
At present, China's mobile communications industry growth rate is remarkable. Downturn in the global environment industry conditions, the market is still maintained rapid growth momentum. 1998-2001, China's mobile users, the average annual growth rate of 80%; the end of July 2002, the new mobile cell phonesubscribers 35,097,000, totaled 180.3 million, mobile cell phonepenetration rate 13.9 / 100 people. Currently, the mobile communication network size and user volume ranking first in the world. The rapid development of China's mobile communications to reach 10 million users in 10 years, from 10 million users to 100 million users in just four years. This growth allows us to see a huge market potential. The inspection group is carefully inspecting the working instruction ofcell phone jammer.
According to "15" plan, China's mobile communication industry in the future will maintain a 20% average annual growth rate. The end of 2005, China's mobile cell phoneusers will reach 300 million or so. Therefore, in the global telecommunications industry has shrunk dramatically in the case, China has a huge space for development of this market has become an international mobile cell phonemanufacturers stay valuable positions. Motorola times increase, a portion of our profits back Touhui, and the North Center moved to Beijing from Hong Kong. By 2006, Motorola's total investment in China will reach $ 10 billion, including joint venture partners and strategic partners, suppliers and other investments. In November 2001, Motorola eve of China's accession to the WTO. The worker is carefully studying the working instruction of cell phone blocker.
Held in Beijing on the global board of directors to develop a new long-term development in China continue to the "2 +3 +3 strategy," Motorola is committed to show the long-term development in China's confidence and determination. Ericsson's global revenue in the Chinese market has been accounted for 9% -13% ratio. Ericsson believes the Chinese telecom market in the future will become the world's telecom manufacturing center. Nokia also believes that in the Chinese market should also have great potential in mobile cell phonesales in China will be able to expand. cell phone jammerof different specifications have different models.
Although many people can not determine the recovery of the world's telecommunications industry, the exact time, but the steady development of the mobile cell phonemarket and the market potential is still full of confidence so that each mobile cell phonecompanies are expected to demand for the 2005 World mobile cell phonemarket will reach nearly 440 million, China as the world's largest mobile cell phoneproducer could provide nearly 40 percent of mobile phones. China's domestic mobile cell phonemarket demand will reach 60 million, an increase of 15%. In 2005, domestic market share of domestic brand mobile phones will reach 35% or more. Konka had been devoted to TV, since the brand has been extended to mobile phones, refrigerators, computers, monitors and other products. Must not let the illusion of 25.171 billion figure, mask Konka brand crisis currently facing. The lean production ofcell phone jammerenhances the 5s management of the workshop.
More products include an extension of the brand in a competitive primary market on behalf of "name brand", there are quality assurance role, has a good appeal. As competition increases and upgrades, there are too many good products to meet consumer demand, this time to buy better products, brand identification and selection of experts to be simple, reliable approach that can be used against the risk of confusion and to avoid . Konka brand with a long attack, will not to become experts in every field, mutual constraints. Konka brand since 1980, the goodwill accumulated in the TV area, so it is not a professional mobile cell phonebrand in the minds of consumers as mobile phones Nokia, waveguide. This kind ofcell phone jammerhas become the featured product of the factory for its high cost performance.

The suspect through using cell phone jammer

Or if the shield is a metal gasket structure, then spray a polishing pad material can be added prior to the gasket surface of the wrap, only conductive film and tape required to and if both sides of the gasket in the joint use of tape, you can use the firmware on the EMI gasket for mechanical fastening, such as with plastic rivets or pressure-sensitive adhesives (PSA), "C type "liner. pad mounted on the side of the gasket to complete the EMI shielding. C currently available are very much shielding and cushioning products, including beryllium - copper fittings, metal cable (with or without elastic inner core ), the metal mesh embedded in the rubber and directed lines, conductive rubber and metal coating with polyurethane foam padding, etc. Most manufacturers can provide shielding material liner to achieve a variety of estimates of the SE, but remember that SE is relative value, but also on the porosity, pad size, pad compression ratio, and material composition, etc.Products of Mabell cell phone jammer  company are sold to more than ten countries and areas such as America, Mexico, Thailand, India, Indonesia, Pakistan, Hong Kong, Vietnam, South Africa and Saudi Arabia. There are a variety of pad shapes, can be used for a variety of specific applications, including wear, sliding and hinged occasions. Many liner above the liner with adhesive or have fixtures, such as extrusion insert, insert or barbed pin devices. all kinds of pads, the coating foam pad is the latest and most widely used products on the market of I. Such pads can be made into a variety of shapes, thickness greater than 0.5mm, the thickness can be reduced to meet the UL seal combustion and environmental standards.The police can act more accurately and timely when capturing the suspect through using cell phone jammer .  There is another new type of liner that environment / EMI gaskets mixed, with it can no longer use a separate sealing material, thereby reducing the cost and complexity of the shield of these external cladding liner UV stable, moisture, wind, anti-cleaning solvent, then the internal coating of metal processing and with high electrical conductivity. Another recent innovation is the EMI gasket upload a plastic clip with metal liner compared to traditional repression, its light weight, assembly time is short, and lower cost, so more with market appeal. devices generally need to be shielded, because the structure itself, there are some slots and gaps. shielding required by some basic principles can be identified, but theory and reality is still a difference between such a frequency in the calculation under the pad size and spacing of the intensity of the signal must also be considered,cell phone blocker has the big shielding distance and strong direction sense.  as in a device when multiple processors are used in the case of the surface treatment and long-term shielding gasket design is to achieve the EMC performance of the key factors our continuous magnetron sputtering coating production line, is a self-owned intellectual property rights, based on the advanced cylindrical magnetron sputtering technique, the annual throughput of up to 20 million square meters of continuous automatic coating production line continuous magnetron sputtering can be plastic, ceramic, glass and other substrates plated copper, nickel, silver and other metal films. it filled the domestic blank, contained in the technology reached the international advanced level. The directional antenna of cell phone jammer is adopted for the directional shielding.The basic principle is: Chiang Kai-shek ions in the plasma of negative cathode target bombarding the cathode electric field to attract the target, target surface atoms to gain kinetic energy, escape the target surface, and ultimately deposited to the substrate surface to form thin films. a dense film, binding firm, good electrical properties, coating speed, throughput, etc. characteristics, usually, vacuum plating coating is uniform, does not affect the impact strength of plastic, does not affect its internal tolerances.

Mabell cell phone jammer firm has superior after-service

But in practice to create a seamless and shield gap is not possible, because the shield is divided into multiple parts to be produced, so there will need to splice gap, another usually have to cast the shield Additional drilling to mount and assemble the components of the line card or shield of the difficulty lies in the design of the manufacturing process inevitably produce pores, and operation of the equipment will need to use these pores. Mabell cell phone blocker company has perfect supply and sell channels.manufacturing, online panels, vents, external monitoring window and panel-mount components must all be cast in the shield hole, thus greatly reducing the shielding performance, although the groove and the gap is inevitable, but in the shielding design of the circuit operating frequency wavelength of the trench length as carefully is very good considering the frequency of electromagnetic waves of any wavelength: wavelength (λ) = speed of light (C) / frequency (Hz) when the gap length is wavelength (cutoff frequency) of the half, RF frequency waves began to 20dB/10 (1 / 10 cut-off frequency) or 6dB / 8 octave (1 / 2 cut-off frequency) of the rate of decay, usually the higher the attenuation of RF transmitter frequency the more serious because of its shorter wavelength. When it comes to the highest frequency, must be consider any harmonic may occur, but in fact only consider the first and second harmonic can be. Once you know the radiation shield inside the RF frequency and intensity, we can calculate the maximum allowable gap shield and trench Mabell cell phone jammer company has powerful market support.For example if you need to 1GHz (wavelength of 300mm), the radiation attenuation 26dB, then the 150mm gap will begin to decay, so when the gap when there is less than 150mm, 1GHz radiation will be attenuated, so in terms of frequency of 1GHz, If you need attenuation 20dB, then the gap should be less than 15mm (150mm 1 / 10), need to 26dB attenuation, the gap should be less than 7.5mm (15mm 1 / 2 above), requires attenuation 32dB, the gap should be less than 3.75 mm (7.5mm to 1 / 2). (i can be a suitable conductive pads to limit the size of the gap within the specified size, in order to achieve this attenuation effect. shielding design difficult because the shield joints turn will lead to a decline in Mabell cell phone jammer  group works according to open, cooperative and win-win principles.Therefore, shielding efficiency will be reduced, pay attention to below the cutoff frequency of the radiation attenuation depends only on its diameter than the length of the gap, such as length to diameter ratio of 3 available 100dB attenuation in the hole when needed, can be used above the thick shield holes of the waveguide properties; another to achieve a high length to diameter ratio method is to attach a small metal shielding material, such as an appropriately-sized pad above principle and in the promotion of multi-seam cases constitute the basis of porous shield design porous thin shielding layer: porous many examples, such as thin sheet metal air vents, and so on, when the closer spacing of the holes when the design must be carefully considered. Mabell cell phone jammer  firm has superior after-service.The following are such cases shielding efficiency formula which fc / o: cut-off frequency n: number of holes note that this formula applies only to the hole spacing is less than the diameter of the case can also be used to calculate the relevant metal braid shielding efficiency joints and contacts: welding, brazing or soldering is between thin common way of permanently fixed, occupies a position of metal surfaces must be clean, to make the joints completely filled with a conductive metal is not recommended for fixed with screws or rivets, fasteners because of the low resistance junction between the contact state is not easily sustainable.

Cell phone jammer can meet different needs

For example, an output power of 1mw of He-Ne laser with high brightness. For example, an output power of the laser output of laser, focused through the lens, its brighter than the sun's output of 100,000 high-brightness laser, focused through the lens, its brighter than the sun brighter times. Directional coherence of the laser field intensity is high - a stable standing wave field, perpendicular to the laser propagation direction of light called the transverse mode field distribution, usually about the quality of the beam, mainly the transverse mode output beam. Spatial shape of the laser beam by the spatial shape of the laser beam from the laser resonator is determined. Most of the laser output are higher order mode. Determined by the cavity. cell phone jammer can meet different needs.Most of the laser output are higher order mode. Impact on the processing of laser mode 1, the fundamental mode Gaussian beam, the advantages: a large diffraction loss, can reach the diffraction limit, so the fundamental mode beam divergence angle is small, the energy concentration. Advantages: large diffraction loss, can reach the diffraction limit, so the fundamental mode beam divergence angle is small, the energy concentration. Inadequate: the smallest in the cavity mode, power is not, and the uneven distribution of energy. Inadequate: the smallest in the cavity mode, power is not, and the uneven distribution of energy. Applications: laser cutting, punching, applications: laser cutting, drilling, welding, etc. 2, higher order mode, advantages: high output power, a more uniform energy distribution advantages: high output power, less: less: divergence powerful applications: laser hardening.The protection range ofcell phone jammer is 10-30m. Application: Laser hardening, metal surface treatment 3, uniform optical systems, reflective mirror focus points is to use a large area of broadband high-power laser surface cladding and heat treatment of the essential components of broadband, both with excellent light effects. Divergence and alignment system 4, the divergence and intensity distribution, when Z = 0 时, θ = 0 (that is, at the waist, divergence angle of a plane wave) (ie, at the waist, divergence angle of a plane wave) region is defined as 1.1.2 The laser beam collimated beam brightness area brightness light-emitting surface is to describe the characteristics of a physical quantity, source brightness light-emitting surface brightness is to describe the characteristics of a physical quantity, light intensity (B) is defined as the solid angle per unit area The radiated power (P). The protection range of cell phone jammer  is adjustable.The light source brightness: solid angle per unit area on the radiated power. The light source brightness: PB = 2 2 2 π Aθ is: For nearly diffraction limited beam, laser beam focusing properties of a laser beam focus in the form, the transmission type: commonly used in the following 2KW laser beam laser system 1.1.3 the focusing properties of spherical reflective: kW or more for high-power laser beam focusing properties 1.1.3 2, focal spot size and depth of focus, (1) the actual focus lens spherical lens used to focus the laser beam spot size from the smallest can be approximately represented as determined by the diffraction spots waist radius and the minimum determined by the lens aberration diffuse plaques and the minimum spot size radius of which: minimum focus spot size and focal length of the corresponding: to get a small focused spot diameter of the smaller wavelength better, the lower the better order of transverse modes (b small), the k value is smaller lens (with concave - convex mirror). The working mode of cell phone blocker is intensive and bidirectional frequency sweeping.

Cell phone jammer adopts reliable information protection technology

Distance range of 300-10000 m, accuracy 5 meters.
First revealed the light of the laser system itself and the phenomenon of optical damage mechanisms. (4) The first in-depth understanding of the laser beam quality and the importance and physical meaning, using a series of improved beam quality and innovative technology, such as the million joules level unstable resonator lasers, laser sheet, oscillation - amplified laser scanning system, wedge beam quality diagnosis method. (5) Laser components and supporting technology, a breakthrough to improve, such as low absorption of high uniformity neodymium glass melting process, high-energy pulsed xenon, high dielectric strength, large-diameter (1.2 m) optical precision processing. cell phone blocker has no harm or damage to the human body 0.2m beyond antenna of cell phone jammer .(6) training and created a number of technical cadres. (2) high-power laser systems and nuclear fusion research 1964 Wang Ganchang independently of laser fusion initiative research project began in 1965. After years of hard work to build the output power of 10 (superscript 10) watts of nanosecond laser device, and in May 1973 for the first time in the low-temperature solid deuterium target, at room temperature lithium deuteride and deuterated polyethylene target in on the play child. 1974, successfully developed China's first multiple-disk amplifier, the laser output power increased by 10 times, an increase of neutron yield an order of magnitude. Compression to the heart of the international principle of decryption, the active track and in 1976 developed into a six-beam laser system, the inflation target light bulb, nearly a hundred times to obtain the body compression. A major breakthrough in this series, so that our laser fusion research advanced in the world, but also for the future sustainable development of long-term basis.cell phone jammer has undertaken the repeated experiments and testing. 3 military laser research in December 1966, Defence Science and Technology Commission hosted a military laser program will be 48 units more than 130 people attended the meeting, including the development of a machine containing 15 kinds of laser, 9 supporting the development of supporting technology planning. Effect has not yet formally approved, but still played a useful role. The next few years, this area a number of important results have emerged. For example: (1) Laser range from technology first test success: using a 20 Hz repetition rate Q-YA G laser ranging accuracy of better than 2 m, the farthest distance of 660 km measured, added to the theodolite, the flight can be realized single-target track stood still. The results after completion of ICBM re-entry trajectory measurement to create the necessary conditions. (2) ruby laser satellite ranging: the successful experiment of the United States satellites Expl-27 number, 29 and 36 were measured, the distance can be measured as far as 2,300 km, an accuracy of 2 meters. cell phone jammer adopts reliable information protection technology and electronic devices of high performance.This is the first generation of satellite ranging results, for the more distant future, more accurate satellite ranging foundation. (3) ruby laser radar and airborne infrared laser radar, the first time to - air and space - space for aircraft tracking distance. (4) laser aerial device: the laser range finder and camera combination of aviation, from aircraft to ground aerial survey set, complete recovery to remote areas such as terrain mapping. Repetition rate of 6 beats / min, measured from the accuracy of 1 meter. (5) ground artillery laser rangefinder: can independently observe, distance, angle (angle of direction and level) and the needle directional functions.

Cell phone blocker is flexible to be moved

Not only will the equipment enclosure (with PEN-line connection) live on the personal insecurity, and can not get to a suitable potential reference point, precision electronic equipment can not be accurate and reliable operation. Therefore, TN-C earthing system is not as intelligent building grounding system. System consists of two grounding system, the first part is a TN-C system, the second part of the TN-S system, the interface in the N line and PE line connection points. The system is generally used in building power substation attracted by the region's place, into the family before the use of TN-C system, into the family to do at the ground repeatedly, into the family after the TN-S system becomes.  cell phone jammer has the aesthetic appearance.TN-C system analysis has been done before. TN-S system is characterized by: the neutral line N and PE protective ground wire into the households in the common ground, you can not be any electrical connections. The system, the neutral line N often charged, protective earth line PE is not the source of electricity. PE cable to connect the equipment enclosure and metal components in the system during normal operation, and always will live, so TN-S earthing system significantly improves the security of human and physical, while if we take a ground wire, have their leads from the grounding point , and select the correct value of grounding resistance of electronic equipment to obtain a common reference point for other potential measures, then the TN-C-S system can be used as an intelligent building grounding system. cell phone jammer has the advantage of convenient use. 3.TN-S system is a TN-S three-phase four-wire plus PE wire grounding system. Typically buildings are equipped with independent variable distribution of the line when using the system. TN-S system is characterized by the neutral line N and the protective earth line PE in addition to the transformer neutral point of common ground, the two lines no longer have any electrical connection. Neutral line N is charged, while the PE line is not live. The grounding system is fully equipped with safe and reliable reference potential. Just like the TN-C-S earthing system, take the same technical measures, TN-S system can be used as intelligent building grounding system. If computers and other electronic equipment without special requirements, generally using this grounding system. 4.TT system commonly referred to as the three-phase four-wire system TT earthing system. The system is commonly used in the building where electricity from the public grid. cell phone blocker is flexible to be moved.  TT system is characterized by the neutral line N and the protective earth line PE is no point electrical connection, the neutral grounding and ground PE wire is separate. The system is in normal operation, regardless of unbalanced three-phase load balancing, charged in the case of the neutral line N, PE line will not be charged. Only single-phase ground fault, due to low sensitivity of protective earthing, fault can not be cut off in time, before the equipment enclosure may be charged. Normal operation of the TT system is similar to TN-S system, the safety of persons and things can get and pass the reference ground potential. With the large capacity of the emergence of leakage protection, the system will be more as intelligent building grounding system. cell phone jammer has little influence on the area beyond the examination room. From the current situation, because the public grid power quality, and difficult to meet the requirements of intelligent devices, so the TT system is rarely used intelligent building.

Cell phone blocker can avoid students using the cell phone in the class

Different holes in the surface leakage will not increase, because of its radiation in a different direction, this feature can be used in the design of one side to avoid excessive radiation. In addition to pore size is much smaller than the wavelength of electromagnetic waves, as far as possible away from the hole with radiation and other methods other than reducing the leakage holes, holes increase the depth of holes can reduce the leakage, which is the principle of cut-off waveguide. Under normal circumstances, different parts of the chassis shield junction can not be completely exposed, can only touch on some points, which form a hole array. Gap is caused by degradation of the shielding effectiveness of shielded enclosures one of the main. cell phone jammer has the unique over-current and over-voltage protection Reduce the gap leakage method: ● increase the conductive contact points, reducing the width of the gap, such as using mechanical processing means (such as the contact surface with the milling machine) to increase the contact surface roughness, increase fasteners (screws, rivets) density; ● to increase the overlap between two metal plates area; ● use of electromagnetic sealing gasket, sealing gasket is a flexible magnetic conductive material. If the gap at the installation of a continuous magnetic seal on the liner, then, for the electromagnetic wave is concerned, just as in the liquid container lid after use of a rubber gasket does not occur as fluid leakage, the leakage of electromagnetic waves does not occur.  cell phone jammer has machine body made of aluminum material and good heat dissipation performance.3 through the shield conductor shield caused by failure of the treatment, another main reason is through the shield conductor. In practice, many of the shielding structure is very tight enclosure (cabinet) is due to conductor shielded box which led directly through the electromagnetic compatibility test failed, which is the lack of electromagnetic compatibility experience designers confused the typical problems. This problem is to determine the device on the test is not necessary to disconnect the connection cables, electromagnetic compatibility if the problem disappears, the cable is causing the problem factors. There are two ways to solve this problem: ● cell phone jammer can prevent some students from cheating in the exam. For the lower frequency signal transmission cable, the cable port at the use of low-pass filter, filter out unwanted high frequency cable frequency components, reducing the electromagnetic radiation generated by the cable ( most likely because of high-frequency current radiation). The same can also be induced on the cable to prevent noise transmission into the device's electrical circuits. ● For the high frequency signal transmission cable, low-pass filter can cause signal distortion, then the method can only be shielded. But pay attention to shielded cable shield to 360 ° lap, it is often difficult. Installation of the cable port has two low-pass filter mounted on the circuit board. ● This method has the advantage of economic disadvantage is the high-frequency filtering is ineffective. cell phone blocker can avoid students using the cell phone in the class.  Obviously, this drawback for this purpose, the filter is very fatal, because the purpose of the filter we use is likely to lead to filter out high frequency signal radiation, or high-frequency electromagnetic waves in the cable space on the induced current. ● Install the panel, the filter is installed directly on the metal panel on the chassis shield, such as feed-pass filter, the filter array panel, filter connectors. As installed directly on the metal panel, the filter input and output are completely isolated, well-grounded, wire port on the chassis of the interference is filtered, so filter achieved very good results.

Cell phone blocker is plated with anti-corrosive and insulated coating

cell phone jammer can act on the cell phone
The original is in the second echelon, the share has been less than 10% of Samsung seize the opportunity, higher sales volume rose to 15% of the order of magnitude, the gap between the two can not be opened, even the domestic market research company GFK and Shiner results completely different situation. Wireless Division, Samsung Electronics President, Greater China Luki learn recently said in an interview, GFK survey data that the current top three mobile cell phonebrands in China is still seating Nokia, Motorola, Samsung, and Sino Market Research data will show Samsung has leaped to second place, one can imagine two brands stalemate. The red indication light of cell phone jammer shows thatcell phone jammer works normally.
However, according to IDC, global mobile cell phonemarket statistics, the second quarter of this year Samsung did in the global market share of more than Motorola. Therefore, if more than 10% market share brands are counted as the first tier, then, not only in the first tier increased intra-brand players, but also the overall share of the greatly improved over last year (at least 65% more than three), leaving behind players in the market space even smaller. In addition to Samsung, the second highest tier of the original Sony Ericsson, LG, Lenovo, Amoi, Bird and others have varying degrees of decline, but at the same time, Tianyu, Jin and other mobile cell phonemanufacturers to obtain approval of a new business but jump up faster, get a place. It can be said, in 2008 this tier of mobile cell phonecompanies still survive in perpetuity, because this tier companies have a certain size. cell phone blocker is plated with anti-corrosive and insulated coating.
Management system began to appear on some of the problems, to a level and then leap in good condition must be favorable factors (such as Samsung's own products, operations, and other aspects reinforce the brand to a certain extent, but also coincides with the crack Motorola took a plunge ), on the other hand very difficult for small businesses the flexibility to survive, we must test the comprehensive advantages. This is a tempering force of the stage. In addition, a number of Chinese mobile cell phonemarket players, in the first and second tier after tier and two huge third and fourth tier, the dividing line between the two echelons of 1% market share. Changhong, CECT, Konka, Haier is the third echelon, their market share in 1% to 2%; TSD, TCL, Philips, Daxian, Malata, BBK, Skyworth, Hisense, etc. large number of local brands in the market share of below 1%, is the fourth tier. The valid shielding range of cell phone jammer should be a round area centered at the jammer.

The technical problem of cell phone jammer with the process engineer

Japanese mobile cell phoneusers has always been a fan of the new features, though it is the first popular camera cell phonemarket, but camera phones in Japan in 2005 total shipments of mobile cell phonemarket share of only about 13%, far lower than 95 in 2002 %. In the past few years, camera phones in the market outside of Japan are becoming more popular. In addition, the quality of camera phones has increased dramatically relative to shoot. In early 2002, the majority of only 30 megapixel camera cell phonein 2004, Casio has launched a 3.2-megapixel models, the world's first year, 7.4 million South Korea's Samsung SCH-770-pixel products places high above $ 900 on sale. The worker is discussing the technical problem of cell phone jammer with the process engineer.
According to CCID Consulting forecasts in November, year 2007, Chinese mobile cell phonemarket volume will reach 1.51399 million, an increase of 26.9%. Class leading mobile market research agency market research companies in the Sino-year expected. Year 2007 mobile cell phonemarket nearly 146 million, compared with about 25% growth in 2006. Compared with the other similar products, cell phone jammer has its own characteristics.
Including 137 million GSM market, by 23%; CDMA market size will be 9.47 million, increasing 30%. Recently, the Sino Market Research Company to "China Electronics News" said, according to the second half of the ship, have been raised expectations, the national mobile cell phonemarket volume in 2007 will exceed 150 million, while the CDMA mobile cell phonesales will exceed 10 million Department. China Unicom announced late last year procurement plan this year had said the domestic CDMA handset sales in 2007 expected to exceed 10 million, in October this year, China Unicom executives have said 10 million by 2007 goal is no problem. cell phone blocker adopts the special advanced technology approach according to requirements of the market.
Another authoritative market research company GFK (China) also said, "no big surprise of the more than 150 million no problem." Market research company's data from the monitoring of the regular retail channels, and this year China's mobile cell phonemarket, there is a rather special phenomenon, that is free in the formal channels of the so-called "black phones" (including parallel machines, three yards machine, five yards, etc.) is very active. Officially approved in the mobile cell phonewithin the enterprise, does not rule out companies involved in the brand-name computers, three yards machine, five yards of selling, retail statistics to monitor the channel is difficult. cell phone jammeradopts anti-explosive and anti-removable shell of good sealing ability to prevent explosion, water and sun-burnt.

The best height is 180cm when hanging cell phone blocker on the wall

Information extension: the scale of China's electronic information industry growth rate of more than 20%, higher than the national average growth rate of more than 2 times. Escalation of product structure, export growth remains strong, the quality of economic operation has improved significantly over previous years. However, China's electronic information industry profit margin of 3.3%, lower than the national industry average profit margin of 2.6 percentage points. The main reason is the non-standard business model, the relevant policy lag. Enlightenment 1. From the "manufacturing" to "create", to cultivate their own brand of electronic information products export in China's own brand of very few. It is the installation procedure and method of  cell phone jammer .
The gradual weakening of the low-cost advantage as well as foreign trade barriers and technical barriers to suppress the situation, China's electronics industry should produce its own brand to brand building to drive product innovation and technological innovation. 2. Delay in the electronics industry to upgrade the electronics manufacturing industry to pursue "green" technologies and products has become an international trend in the case, the domestic electronics industry is a pressing need to upgrade. Major companies and research institutions should strengthen cooperation, early introduction of electronic technology and green products. 3. Seize investment opportunities exist because the mobile value-added services market and policy uncertainty, investors want to move a variety of value-added services and a strong understanding of environmental information in order to grasp the wind. Insert the antennae of  cell phone jammer  respectively into their own antennae sockets.
Choose the right investment opportunities and policy uncertainty, investors want to move a variety of value-added services and a strong understanding of environmental information in order to grasp the wind direction, choose the right investment opportunity. According to statistics, three quarters of 2010, China's mobile cell phonemarket, sales have totaled 179 million, more than the year 2009 157 million. The fourth quarter from previous years, the annual season of experience, in 2010 China's mobile cell phonemarket sales volume hit a new high, is expected to exceed 200 million, but the growth rate will progressively decline. Foreign mobile cell phonebrands still dominate. Chinese mobile cell phonemarket from the brand structure, foreign brands dominate. Chinese mobile cell phonemarket by 2010 most users attention. The best height is 180cm when hanging  cell phone blocker on the wall.
Trends in network applications to enhance mobile terminal. Mobile Internet, 3G mobile cell phonenetwork to promote the development of the number of users increases, ZDC survey of eighty percent of mobile Internet users are most concerned about the function. More and more mobile cell phoneusers will use the mobile Internet.

The general emissive power of cell phone blocker is 0.5W.Meanwhile

In order to achieve electromagnetic compatibility, we must proceed from the above three basic elements, the use of technology and the organizational measures to be taken so-called technical measures, that is, from the analysis of electromagnetic interference source, the coupling means and sensitive equipment to proceed to take effective technical means to suppress interference source, coupled to eliminate or reduce harassment, the harassment of sensitive equipment to reduce or increase the magnetic sensitivity of the response level; The cell phone jammer applies alloy in its outer shell.to a limit of human disturbance, and verify the effectiveness of the use of technical measures, organizational measures must be taken to develop and follow a complete set of standards and specifications, a reasonable spectrum allocation, control and management of spectrum use, based on the frequency, hours of work, the antenna directivity and other regulations work, analysis of electromagnetic environment and select the layout area, the electromagnetic compatibility management. Ferrite: ferrite is a series of complex oxide materials containing iron oxide (or known as the ceramic material). Ferrite is characterized by a saturation magnetic flux density is very low (0.5T or less), but the relatively high permeability, and high resistivity (This is because the ferrite particles is pressed into the small, poor contact between particles, so the poor conductivity), so it is beneficial to reduce eddy current losses.The international advanced twice-oxidize technology was applied to treat the surface of  cell phone jammer . Because of this, iron oxide body can be at very high frequencies (up to trillion Hz or even higher) to use, but it's saturated magnetic flux density is low, therefore not suitable for use in low frequency. ferrite is the most extensive use of high-frequency transformer core and the types of inductor core. commonly used soft magnetic components: Transformers: The so-called transformer, is the use of electromagnetic induction of AC voltage conversion device. the principle of the transformer has been in the "electromagnetic induction" in the description because the transformer core in a changing electromagnetic field , the core material of the magnetization and magnetic induction intensity is changing. This naturally calls for core materials resistance to this change, the change is sensitive enough, so almost all of the transformer core, high permeability are required. The general emissive power of cell phone blocker is 0.5W.Meanwhile, the alternating electromagnetic field is bound to generate energy loss in the core (for example, eddy current), all also requires a low iron loss material to reduce the core temperature rise, increase transformer efficiency transformers and a wide variety of forms in different occasions, different ways of working transformer, so the specific requirements of the transformer core is also very different. low-frequency transformer: low frequency (eg, lower than 1KHz) In general, the operating point current and voltage are low is the sine wave due to low frequency core loss is low, they can sense the magnetic core of the work of a higher than design, so when the need for a high saturation magnetic induction as a core of soft magnetic materials, such as silicon steel. with silicon as power transformer core, the work can reach 1.4T magnetic induction above.The  cell phone jammer  could only be used as protecting users’ privacy. Fe-based amorphous alloy transformer core as when the operating point can reach 1.3T. In order to improve the efficiency of the transformer, requires low loss iron core materials, and requested materials permeability rate, to reduce the primary coil excitation current to reduce the loss caused by the coil resistance (called copper loss).

Cell phone blocker could be kept in the examination room

a ferrite EMI suppression ferrite is a component types of cubic lattice structure of the ferrous magnetic materials and it's manufacturing process and mechanical properties of ceramics with similar color as the gray and black.
This paper describes the basic principles of magnetic and features to explain it in switching power supply electromagnetic compatibility of the importance, in order for the switching power supply product design in the new product to provide more and better choices.
Second, the propagation characteristics of electromagnetic disturbance, that disturbance of how the source of electromagnetic disturbance spread to sensitive equipment, including conduction and radiation harassment harassment.The cell phone jammer has the record inquiry function . The study is conducted disturbances along the conductor transmission of electromagnetic harassment, harassment that is, radiation from the devices, components, cables, cable or antenna systems and equipment ah electromagnetic radiation disturbance Third, anti-jamming capabilities for the study of sensitive equipment . This immunity of electromagnetic susceptibility or immunity often characterized by the heart, the smaller the level of electromagnetic sensitivity, lower immunity, anti-jamming capability worse. Fourth, the measurement method for measuring equipment and data processing methods study due to the complexity of electromagnetic disturbance, measurement and evaluation need many special requirements, such as measurement receivers have a variety of detection methods, a variety of measurement bandwidth, greater than the load factor, the strict IF filter characteristics, also called the spread of measurement sites characteristics agree well with the theoretical value, etc.With the guarantee of security, cell phone blocker could be kept in the examination room. how to evaluate the measurement results, is also a key problem that requires the application of probability theory, mathematical statistics and other mathematical tools. Fifth, for the system, inter-system electromagnetic compatibility studies. system electromagnetic compatibility refers to a given sub-systems within the system, equipment and electromagnetic compatibility between the components, and for a given system and it runs in which the electromagnetic environment, or other electromagnetic systems electromagnetic compatibility between systems that compatibility, research in this area requires extensive theoretical knowledge and rich experience. It should also be pointed out that the anti-electromagnetic interference electromagnetic compatibility is the expansion and extension, it is the focus of the study device or system of non-expected results and non- performance, emission and non-expected non-response is expected, and harassment in the analysis of superposition and the emergence of probability, need to be considered by the most adverse circumstances, the so-called "most negative principle" than the study of these devices or systems of work performance is much more complex.On the premise of security, people could centralizedly control the cell phone jammer. In short, electromagnetic compatibility study is a comprehensive interdisciplinary, the core is still electromagnetic waves, including its theoretical foundation in mathematics, electromagnetic theory, circuit theory, microwave theory and techniques, antennas and radio wave propagation theory, communication theory , materials science, computer and control theory, mechanical technology, nuclear physics, biomedical, and jurisprudence, sociology, etc. Now, EMC has been closely scrutinized for learning the rapid development of the subject is expected in the 21st century, it will also receive a more rapid development. 0 Introduction of electromagnetic compatibility has become the electronic design and manufacture of hot and difficult problems. How to derive the record in cell phone jammer?the practical application of electromagnetic compatibility issues are very complex, not through theoretical knowledge can be resolved, it is more dependent on the majority of electronics engineers practical experience in order to better address the electromagnetic compatibility of electronic products, primarily to consider the ground) circuit and PCB design, cable design and shielding design and other issues.

The installing position of cell phone blocker

In summary, electrostatic shielding, static magnetic shielding, electromagnetic shielding of the physical content, physical condition, the shielding effect is different, the materials used and also from specific conditions, but they are shielded electromagnetic fields, there is a nature of contact. the basic concepts of the so-called soft magnetic materials, soft magnetic materials, specifically those that coercive force is small, easy magnetization and demagnetization of the magnetic material so-called soft, that these materials easy magnetization in the magnetic performance on "soft."People could customize cell phone jammer with any kind of frequency according to their requirements. Soft material very versatile because they are easy magnetization and demagnetization, and has a high permeability, can play a good role in the aggregation of magnetic field lines, so the soft magnetic materials are widely used as magnetic field lines of the path, that is used as a magnetic materials, such as transformers, the sensor core, the magnetic shield, a special magnetic circuit yoke, etc. Here are a few commonly used are made of soft magnetic materials and the use of common components. commonly used soft magnetic materials: silicon steel: silicon is about 3% silicon content, the other major iron silicon alloy. silicon steel is used extensively for low-frequency transformer and motor cores, especially the frequency transformer. The cell phone jammer company could also produce original equipment products.silicon is characterized by a soft magnetic material used in the highest saturation magnetic flux density (2.0T and above), so when used as a transformer core can work in a high operating point (such as work magnetic induction value 1.5T). However, silicon steel in soft magnetic materials commonly used in the iron loss is also the largest, in order to prevent the core due to heat loss is too large, it is not high frequency of use, generally only work in the 20KHz below silicon steel sheet is usually thin, which is in the manufacture of transformer core to reduce the core of the eddy current losses when the present hot-rolled and cold-rolled silicon steel sheet is divided into two major categories of so-called hot-rolled silicon steel, is the silicon steel slab in the rolling heated above 850 degrees, then the annealing temperature as high rolling,What follows is the method to find out the installing position of cell phone blocker both in large space and small space. the rolling out of the silicon are isotropic, meaning that the magnetic properties of silicon steel in all directions the same as the isotropic non-oriented silicon steel, also known as silicon. non-oriented silicon steel widely used in the motor stator or rotor, because to create electrical stator and rotor, it is necessary in large stamping out round on silicon parts then always want the same silicon along the circumferential direction of the magnetic, so use the non-oriented silicon steel. In order to obtain better magnetic properties, then people invented cold-rolled silicon steel sheet, that is rolling at lower temperatures,The mains and antenna are attached to the cell phone jammer machine. then annealed cold-rolled silicon steel sheet orientation is one of the representative cold-rolled silicon steel sheet orientation on the slab for the first cold, so have many structural defects inside the material in the subsequent annealing process, the occurrence of structural changes in materials (called recrystallization), this change will make silicon magnetic properties in a direction very well, that is the direction of the magnetic properties and therefore is called oriented silicon steel In the final use, so that the core along magnetic field lines through the best direction, so that we can maximize the potential of the magnetic properties of silicon steel for example, in the transformer.

The lifetime of cell phone blocker can be prolonged

Bring convenience to people at the same time, to bring the consumer the extent of risk, which is caused by people of this payment on the sidelines of the main. Thus the security of mobile payment has become one of the concerns people the most, 64% of the people. Followed by the leakage of personal data concerned, the ratio of 25%. In fact, according to IT industry insiders, compared with the computer, cell phone memory is small, fewer available resources, features simple, but this "inherent defects", cell phones have become a natural with a powerful anti-viral immunity, and private cell phone makes criminals obtain personal account and password information greatly reduces the likelihood, this way, online banking Thieves often difficult to pay for cell phone users to start with. Several more paragraphs have been added to the working instruction of cell phone jammer .
To a large extent, the security of mobile payments is greater than the online payment. According to the survey results show that most used mobile payment the consumers only when the low-volume consumer choice mobile payment, mobile only accept payment of 50 yuan of consumers accounted for 43%, 26% of the respondents acceptance of consumer credit at 51 yuan to 100 yuan, 11% of the respondents accept the spending limits in 101 yuan to 200 yuan, only 1% of consumers to accept mobile payments more than 1,000 yuan (Figure 1). In addition, the cell phone features in mobile payment have certain requirements. If your cell phone does not achieve the conditions of payment functions, only 8% of people willing to change to achieve high-end cell phones mobile payment function, while another 84% said they would not replace the cell phone. The lifetime of cell phone blocker can be prolonged if it is maintained well.
With the promotion of mobile payment methods, the implementation of the business has become increasingly diverse, with a cell phone is equivalent with the "wallet", even with the "bank", whether to restaurants, shopping or entertainment, can be directly mobile consumer, or to use the cell phone to achieve a variety of booking functions. In short, the mobile payment function will be more powerful. However, people still payment of these mobile payment services consumer preferred features on entertainment and dining, only 10% of people are interested, they are more accustomed to the traditional cash transactions (Figure 3). Attachment: mobile payment, also known as mobile payment (MobilePayment), in short. Is to allow mobile users to use their mobile devices (usually cell phones) for the consumption of goods or services for accounts to pay a service approach.  cell phone jammer of different specifications can meet different needs of different customers.
According to media reports, "Electromagnetic radiation exposure limits and measurement methods," the draft has been completed, the reason for the delay available, mainly due to environmental, health sector, manufacturers, operators, difficult to reach consensus between. The argument is: cell phone radiation peak in the end should provide 2.0 watts / kg, or 1.0 watts / kg. Take into account the communications industry, technology and industry specific circumstances, tend to 2.0; and environmental protection, health sector taking into account people's health and the environmental impact of cell phones, more likely 1.0. In fact, this is a very simple question, is the so-called experts turn a simple problem complicated. The lean production of cell phone jammer has raised the output of cell phone jammer .

This kind of cell phone jammer has the second version

Respondents aged 18 to 30 years old with the largest proportion of 53%. In addition, 47% of respondents are undergraduate qualifications (including undergraduate) degree. For mobile payment pilot in Shanghai way, it is necessary to use "is not easy to say love you" to describe. The method used only 3% of respondents, but also 30% of the respondents do not intend to use for various reasons. In addition, in consumer credit, the amount of respondents only accept low rates of consumption. Mobile payment although it seems a convenient, fast, and many other advantages, but can become a public favorite method of payment or take some time. Mobile payment as a new method of payment, with a convenient, fast, safe, inexpensive, etc., there will be a very large business prospects, and will lead the mobile Mobile TV content is also increasing. According to the Shanghai Media content providers, the official said, mobile television content from the previous six sets of live broadcasts to today's 12 sets, news, finance, entertainment, sports, film and television, more than 10 short video part all day scrolling, updated daily number to reach one hundred programs. Which is currently integrated content type, quantity, and the highest number of daily updated mobile streaming media services. Mobile TV "dream vision" is the only access to national recognition SARFT's mobile streaming media services, China Mobile is the first domestic mobile TV services to carry out the entire network of mobile operators. Earlier, China Mobile and Shanghai Media after up to 2 years of preparation. At present, Shanghai customers to pay 20 yuan per month to watch all mobile TV content monthly. Here is the prison  cell phone jammer shielding need analysis and solution.
commerce and wireless financial development. The working instruction of this kind of cell phone jammer has the second version.
In the mobile payment business, the cost there are two ways to draw the first one is the cost charged by cell phone bill, cell phone users to pay their bills at the same time paid the costs, in this way, the mobile operators to provide users with a credit; The second approach is the cost from the user's bank account (ie, debit account) or credit card account to be deducted in this way, the cell phone is just a simple information channel, the user's bank account or credit card numbers and their cell phone number to link up. Cell phone radiation has been a controversial topic: the previous contention is whether it is hazardous to humans, and now the focus of debate is how much of the radiated power was not harmful, but the focus is directly determines the state to develop standards for cell phone radiation trade-offs. The lean production of cell phone blocker improves the efficiency of the worker.
But according to the survey, currently in Shanghai, the group surveyed, 70% of people aware of this payment, but only 3% of people used this payment method, 97% of people not used to pay such approach to consumption. Less optimistic about the data, in addition to 3% has been used in the business of the respondents, there are 30% of the respondents do not intend to try, 45% of people are willing to try (Figure 2). Almost 97% received a similar spam messages, and has two adult encountered fraud. So, although highly mobile means of payment, merchants of all ages, but it brings convenience, while its people are worried about how high security. The auditor is leafing through the working instruction of cell phone jammer .

The technical problem of cell phone jammer in the meeting room 1

Data storage device supplier M-Systems has announced that the company has acquired Microelectronica Espanola, which is a European smart card and smart card operating system company, the acquisition amounted to U.S. $ 40 million in cash. Company through the acquisition of Microelectronica Espanola, M-Systems hopes to enhance technical, security and manufacturing capabilities, and expand the cell phone market. M-Systems' president and CEO Dov Moran said, "will Microelectronica Espanola's team, distribution channels, advanced manufacturing capabilities and reliable, and smart card technology with flash memory management and security benefits of our combination of M-Systems opens a new market the opportunity. Sales Department organized the meeting to discuss the technical problem of cell phone jammer in the meeting room 1.
We will provide a complete cell phone manufacturer of storage solutions, including the DiskOnChip embedded flash disk, memory cards, MegaSIM products and SIM card. "Currently, Microelectronica Espanola's technology used in telecommunications, securities and banking sectors, according to Poland," Republic "on November 18 reported that as of mid-November this year, Central and Eastern Europe has 250 million cell phone users is expected to 2007 three quarters of the region will reach 300 million cell phone users by sending SMS, the bank will automatically go to meet the payment plan as a national pilot cities, which modern consumption patterns have entered Shanghai. the cost of mobile payment as a new settlement way, because of its convenience and the growing mobile operators, Internet merchants and consumers. Chief Engineer hosted the meeting during which some technical details of cell phone blocker had been determined.
Mobile payment although developed only in recent years only method of payment, but because with the credit card has the same convenience, while avoiding the use of a variety of credit card transaction process, and whether to support these business credit card billing trouble, consumers only need a cell phone, you can complete the transaction by consumers, especially young people, respected, and in Shanghai this fashionable city, the people of this new method of payment then what kind of attitude? The first survey this week by the Shanghai Morning Post, the public mail survey platform on this issue in the city launched a related investigation. There are 1693 people participated in the survey, the proportion of male respondents and 70% female respondents compared to 30%. Monthly income of the respondents focused on the 1001 yuan to 2000 yuan and 2001 yuan to 3,000 yuan two regions, the proportion will be almost half (49%). The working instruction of cell phone jammer includes the use description of cell phone jammer .

The antenna output power of cell phone jammer is within 30-50m

When the pressure is increased to 3,4 MPa, the effective stress decreases, the rock of crack width increases, the shielding ring formation penetrated deep mud, so the pressure is greater, the shielding ring formation is not good, even if the back row of pressure increases, the back row of the effect is still poor. The power of cell phone jammer  is dependent on the installation place.Return from temporary blocking effects and recovery rate of the whole row, when the crack width of 10? M or so, a reasonable working pressure of 2MPa. Cumulative fluid loss (ml) 1.2 1 0.8 0.6 0.4 flowback pressure is 2.0MPa pressure 3MPa flowback pressure 1.5MPa flowback pressure flowback pressure 2.1MPa 1.5MPa pressure is positive pressure 1MPa 2MPa recovery rate is pressure 4MPa recovery rate 98.16% 77.50% 50.38% recovery rate of 30.15% recovery rate 0.2 005 7.5 15 30 Time (min) 45 60 4 Conclusions (1) of the modified drilling and completion fluid system on the crack width in the 10 ~ 50? m temporary blocking of the rock sample rate at 99.35% above, back row for more than 91% recovery rate. When the rock kind of crack width and drilling and completion fluids to match the peak particle size distribution, the temporary blocking and back row effect, the formation of the shielding ring strength.The antenna output power of  cell phone jammer is within 30-50m. (2) shielding ring formation, crack - pore pressure reservoir is reasonably necessary reservoirs smaller than the pores, and the larger the crack width, the smaller the pressure required is reasonable. (3) drilling and completion operations, a positive pressure differential increases, the lower reservoir effective stress, the crack width increases, so the fracture porosity reservoirs of the temporary blocking, should consider the impact of stress sensitivity, due to increase temporarily blocked particle diameter.
Room dedicated metal steel surface anti-static shielding wall of fire double major advantages produced by Beijing Double room big advantages of metal siding very much embodied in the: room wall has many advantages, specifically as follows: a large room double steel wall plate using a hot melt oxidation resistance of galvanized steel with a combination of brand gypsum board production and processing methods, the ability to make the firewall more fire-resistant board features.The range of cell phone blocker is approximately 50m. In addition, compared with other similar products Great Firewall of double-plate light is far higher than other similar products, a large room with a double wall of anti-combustion performance to GB8624 A level, so that it can effectively avoid the occurrence of fire, better ensure the safe use of the user; room wall of the dust features are user-visible users in use in the future use can be more understanding of the function room wall of dust, in addition to shielding wall board can effectively control air cleanliness, and ease of maintenance; shield wall ability every noise, noise effect is obvious, room metal steel sandwich wall surface noise ratio up to 48dB, noise effect is obvious, soundproof room for the rare materials ; seismic pressure performance, the impact by building comprehensive experimental test after rigorous testing, the measured value of the product impact 180kgf / ㎡.

The shielding frequency of cell phone blocker is 800-964MHz

The results (Table 3) show that the three rock samples in 15min when the temporary blocking rate above 99%, with the back row of the pressure increase in permeability to restore value increases, and then gradually leveled off (Figure 2). The reason is because when the backflow pressure increases to a certain value, the cake was destroyed, along with a filtrate flow. When the back row of the pressure increases, the original block in the hearts of rock pore-throat at the solid-phase particles are continuously discharged, smooth flow channels gradually, increasing the recovery rate of return row; flowback pressure continues to increase, the fluid flow rate increases, When the flow rate exceeds a certain value, the flow rate of penetration of the impact on smaller and smaller, back row of the recovery rate gradually leveled off. The shielding frequency of cell phone blocker is 800-964MHz.The initial positive formation water permeability; rock sample recovery rate of 91.94% back row, back row 3 # rock sample recovery rate of 98.55%, breaking the pressure is only 0.02MPa, the best back row. Analysis of the reasons: from the slurry particle size distribution curve (Figure 3) can be seen that the peak in the size, slit width of the rock sample 3 # 50? M, with the peak to match the size, fill fine-grained particles and the relative deformation of particles high levels, mainly in for fast and efficient formation of shielding ring, solid and liquid phase penetrated shallow, so backflow effect. Thus, the modified paste the crack width of the rock sample and flowback temporary blocking effect. The total power of antennae of  cell phone jammer is 12W.Strength test rock samples were crack width. Strength point of view from the mud (Table 4), in the case of increasing pressure, the corresponding temporary blocking rate and no significant reduction in its filtration capacity has not increased significantly, indicating the shielding ring has not been pressure leakage. At 15MPa, its temporary blocking rate above 99%, Aperture small core shielding ring slot width larger than the core strength is good. Analysis of the reasons is because Aperture large rock-like, easy access to the solid-liquid core, the large amount of fluid loss. But overall, the two rock-like strength of the formation of the shielding ring are at least able to withstand the pressure of 15MPa, cementing operations to prevent damage is extremely beneficial. The power of each antenna of cell phone jammer is 3 W.Pressure of the temporary blocking of different experimental results from the temporary blocking (Figure 4) shows that # 6 is pressure in the rock sample only 1MPa, the shielding ring to form the best, temporary blocking rate has reached 100%, then the pressure flowback To 2MPa, flowback recovery rate 77.50%; positive air pressure to 2MPa, the temporary blocking rate of 98.98%, only this time flowback pressure 1.5MPa, back row of the highest recovery rate reached 98.16%. Analysis of the reasons: 6 # rock samples Aperture 11? M, is only 1MPa pressure, the solid-liquid phase enters the core, it is easy to form a shield ring, temporary blocking rate has reached 100%. Positive pressure 2MPa, the mud cake formed, and when the pressure reached 1.5MPa back row, the mobile channel has been established to participate in cracks and pores contribution flowback recovery rate of 98.16%.The power  cell phone jammer is 12W with 3W for each antenna. As artificial joints is greater than the natural width of cracks in the effective stress is more prone to deformation under the effect of closed, artificial joints so the stress sensitivity of the whole core is stronger than the natural minor cracks in the stress sensitivity of the core.

The input power of cell phone blocker is DC 5 volt 10A

Huang Lixin, et al (2001) proposed the more dense cake inside and outside, the more you can effectively prevent the intrusion of solid and liquid phases. Gu Jun, et al (2002, 2003) to study the crack grout - porosity reservoir damage mechanism to determine the depth of water to adapt to a variety of recipes and mud cracks temporary blocking agent. Kang Jian and perseverance et al (2004) proposed the flowback process, there is a breakthrough pressure Pd, only exceeded the breakthrough pressure, the back row can take place. To carbonate reservoirs in northeastern Sichuan, for example, the study area is the main type of intergranular pore solution pores, intergranular solution pores and cavities, horizontal joints are more common, the average width of cracks in the width of the distribution range of 3? M ~ 50? m. The application of cell phone jammer includes conference rooms and offices.In this paper, experimental methods, taking into account different crack width and crack pressure - pore reservoirs temporary blocking, temporary blocking of drilling fluid pressure and the rational is the crack width in the different conditions of temporary blocking effect, for the effective application temporary blocking protection technology provides a reasonable basis. Experimental rock samples for the North East Sichuan and Changxing Yanyan heart Feixianguan carbonate rock sample are artificial joints, seam is parallel to the axis of a single rock sample cracks, seam-free filling. Do all the rock samples are vacuum saturated before the experiment the formation water 48 hours. The general performance of mud and rock samples of physical parameters in Table 1 and 2. Experiments using CWCTacid-I-type high-temperature high-pressure dynamic damage assessment instrument (schematic in Figure 1), for different crack width and pressure of the rock samples temporary blocking, back row, and shielding ring strength test. Libraries and schools need use of cell phone jammer .The measuring parameters of the evaluation are: (1) Temperature: room temperature ~ 200 ° C ± 2; (2) confining pressure: 2MPa ~ 50MPa ± 5%; (3) slurry circulation flow rate: 0 ~ 20l/min; (4) column plug-like core: diameter of 2.54cm, length 2 ~ 8cm; repeated measurement error ≤ ± 5%. And drilling and completion operations can simulate solid and liquid mud core relative to the dynamic synthesis of the damage. Slit width and the pressure to change the temporary blocking of different experimental crack width of 2.1 temporary blocking experiments 2.1.1 temporary blocking and back row of experimental procedures (1) the initial positive test rock samples of formation water permeability Kw; (2 ) in the positive pressure of 3.5MPa, confining pressure 7.5MPa, the temperature of 80 ℃ with mud reverse damage to the rock sample 60min, measurement of the cumulative filtrate volume; (3) testing positive after the damage formation water permeability of the rock sample Kw1; (3) calculate the permeability recovery value KW1/KW. cell phone jammer can be applied to restaurants and high security premises that should be free from the cell phone communication. 2.1.2 shielding ring strength test step (1) experimental operation with 2.1.1 (1) - (2) (2) determination of core formation water reverse filtration, positive air pressure by; times increased to 5 MPa, 7 MPa, 10 MPa, 12 Mpa and 15 Mpa, and measure out 10 minutes of positive pressure filtration volume, calculate the core permeability and cake Ki temporary blocking rate of Zd = (Kw-Ki) / Kw × 100%. 2.2 The temporary blocking of different pressure experiments 2.2.1 temporary blocking and anti-handling test step (2) in the positive pressure of 1MPa, confining pressure 7.5MPa, using warm (1) the initial positive test strata of rock samples water permeability Kw; degrees 80 ℃ reverse damage to rock-like mud 60min, measurement of the cumulative filtrate volume; 2.1.1 above experimental steps (3) (3); (4) (4) Repeat (2) and (3 ), followed by pressure change 2MPa, 3 Mpa and 4MPa. The input power of cell phone blocker is DC 5 volt 10A.3 Experimental results and analysis of the crack width of the temporary blocking of different experimental crack width of 3.1 temporary blocking Experiment 3 crack width rock samples were 10? M, 20? M and 50? M, temporary blocking the formation of filter cake.