The world is so big, in case of separation.
Click the blue word “constructor” at the top → click “…” at the upper right corner Click “set as star ★” the setting of civil air defense engineering signs is a basic work of civil air defense construction and a must see item for civil air defense engineering acceptance.
So how can this work be regarded as the standard? I’d like to share the animation interpretation of the practice demonstration of signs and signs of civil air defense projects in Jiangsu Province, which can be understood at a glance! ☟。.
