Which department is responsible for the installation of civil air defense doors?

Real estate company. Civil air defense is also called civil air defense. Civil air defense is a common word in the world, which means that the government mobilizes and organizes the masses. The civil air defense door was installed by a real estate company. Civil air defense door is a part of civil air defense design, and real estate companies should improve it when applying for construction, trial use and acceptance. Take air defense and disaster relief measures and carry out disaster prevention, mitigation and rescue operations. Civil air defense doors belong to civil air defense protection equipment. As the name implies, the civil air defense door is the people's protection project.