What are the civil air defense equipment designated by the Civil Air Defense Office?

I can understand here that I need to buy the equipment of the civil air defense equipment factory, that is, to protect the sealed door, sealed door and wartime sealing frame for ordinary people, and explosion-proof floor drain for civil air defense ventilation and prevention equipment (manual sealing valve, manual electric sealing valve, civil air defense fan, overpressure exhaust valve, filter absorber, etc.). ), etc. The most important thing is that the embedded parts such as the protective sealing door and sealing frame should be embedded, and the later installation is not urgent. You can find a personal protective equipment factory to show you those first. As soon as you dig a hole in the basement, you should ask the manufacturer for quotation, otherwise the time is too tight to make an inquiry. In some places, there is only one manufacturer, and local protectionism is too heavy. It's good to find out early.