When was this cell phone jammer company founded?

When was this cell phone jammer company founded?
The selection of steel shielding electromagnetic shielding material is for electromagnetic shielding, and electrostatic shielding refers to the electrostatic field of the shield. electrostatic shielding requirements of the shield must be grounded. impact shield electromagnetic shielding effectiveness of shielding is not grounded or not, but shielding conductive continuity damage shield factors conductive shield continuity on different parts of the joints, openings, etc.Products of this cell phone jammer company have approved strict certification from national authorized institutions. Therefore, the electromagnetic shielding of the conductive shield electrostatic shielding stringent requirements than according to the relative conductivity of different materials, the relative permeability and absorption loss, return loss, etc. Department of Numerical Analysis, shield machines generally use a thickness of 2mm steel plate. on the ground using the same materials, room shielding material selection to iron as the base metal material, generally with a thickness of 3mm steel plate. consider the shielding material of the shielding effectiveness of factors also take into account the electromagnetic shielding room overall mechanical properties, design requirements to achieve steel roughness ≤ 4mm/m2, shield vertical ≤ 10mm, and shield seismic ≥ 8 level. So this cell phone jammer company has won trust from clients in general.(c) steel shield connection plate shielded room room including steel and welded steel assembly room shielding electromagnetic shielding room 1, the use of welded steel plate welded to connect the engine room shielding electromagnetic shielding materials (steel) into a unit module manufacture, site installation using welding continuous welding process ( carbon dioxide or other gas shielded arc welding), which is characterized by a narrow weld heat zone, the deformation is small, tight weld, slag-free surface. to ensure shielding module shielding effectiveness analysis of the seams and the entire unit to maintain shielding effectiveness of the shield consistent, while improving electrochemical corrosion resistance of welds. galvanic corrosion will reduce the performance and intermodulation effects, because the electrochemical reaction of the compound is non-linear semiconductor material, will cause the signal mixing, resulting in new interference frequencyThe mobile phone jammer company has made a big progress in developing software. According to different parts of the shielding shell of different capacity, and design of different cross-sectional area of the rectangular shield of steel reinforcement of keel for support, keel using 30mm × 40mm rectangular tube attached to the shield wall of welded steel plate 2, with screw connection electromagnetic shielding room assembled steel plates assembled electromagnetic shielding room: Six panel thickness of the body is made of 1.5mm cold-rolled steel unit module, after galvanizing spray galvanized by M8 bolts, nuts, gaskets and conductive pads assembled. six panels between the body and the shell do the insulation and ground handling. (D) PSD out of the shielded room door with PSD. PSD can be divided into its rotary motion, and mobile. rotary screen locking their doors open and can be divided into manual locking screen door, electric (manual) screen door locking, automatic screen door. rotary screen door for general occasions., easy operation, reliable work, especially the switching process does not account for the use of shielded room space for welded or assembled shield room, its structural features are as follows: (1) double shielded.