Performance：
It is tested according to GB12190-90 standard. Shield index should be satisfied with GJBz-20219-94C standard.

Manufacturing process：
It is tested according to GB12190-90 standard. Shield index should be satisfied with GJBz-20219-94C standard.

Sliding shield door：
Pneumatic sliding shield door has high shield performance and is easy to open and close and can save use space of shielding room.

Twin shield doors：
It is made of copper plating ferrite matrix with good conductance. The? inherent ferromagnetism and high conductance after copper plating can reach shielding requirement of whole frequency range. Automatic device has button manner, IC card manner, numeric password and fingerprint identification etc.

Performance：
It is determined by frequency (Hz) of mixing field (magnetic field, electric field, plane wave and micro-wave ) in working environment and shield quantity(dB).
Door shape can refer to steel fireproof security door model of our company,Door material and hardware is determined according to technical requirements.
★ Swing radiation-retarding door, electrostatic shield door
★ Push-pull radiation-retarding door, electrostatic shield door
　Open direction is parallel moving along the wall, and the door frame structure is different from that of vertical hinged door.
★ Electrical and pneumatic radiation-retarding door, electrostatic shield door
　It is usually suitable for big door. Because it is too heavy and is not easy to open manually, electrical or pneumatic opening manner are applied.