the door to the room, room, the device and the x-ray window

摘要

this is the entrance of the gate of the house, on the door, the vulnerable part in the improvement of heating system, and also to prevent the accident in advance in order to be able to.;the door is usually steel or aluminum welding or cutting the internal voltage to the junction, the production, the basic crime prevention door have the ideal, part of the vulnerable point, strengthen, improve the safety for the purpose of.;according to the invention, the door (14) of the use of the projection (15) to the door the door (17) and the can, and a new type of door to door (16).;the door (11) of the central part of the group that outsiders can see through window (13) that is simple, the security check at the same time, a perspective window (13) to prevent damage to the reinforced glass safety device (18) and a spring (19) device a heating installation, and are to ensure the safety of the structure.