Air defense door up and down hinge copper sets what material to do the best?

Civil defense, also known as civil defense, civil defense is the international common words, English CIVIL DEFENCE, is the government mobilization and organization of the masses, to take anti-air raid, disaster relief measures, the implementation of rescue operations to prevent and mitigate disaster hazards activities. Air defense door is a civil defense protection equipment, as the name suggests, the door is the door of the people's protection project entrance door door. 1, ordinary single, double fan protection closed doors and closed doors 2, live threshold single, double fan protection closed doors and closed doors 3, hose explosion-proof wave shutter 4, hanging explosion-proof wave (shield) 5, landing double fan protection closed door and closed door 6, connecting mouth two-way force double fan protection closed door 7, the ramp open double fan protection closed door 8, protective fire closed door, fire closed door 9, Hunan Jintai Hardware and Machinery Co.,Ltd specializing in the production of various types of man-door copper sets, air defense door skateboard, air defense door up and down the hinge sets of copper sets, lock sets, air-door copper worm gear products, praised by customers over the years.

                           

                                           Upper and lower hinge copper sets

Generally use ordinary high-strength brass production can be. In case of special requirements, please contact us directly.