Civil defense door suitable for underground commercial place
An air defense door and air defense sub-door technology, applied in the field of air defense doors, can solve the problems that the structure of the rolling shutter door cannot be changed, and are not suitable for air defense fortifications, etc., and achieve the effect of improving the explosion-proof effect, strengthening the explosion-proof ability, and strengthening the overall structure.
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[0044] The present invention will be further described below in conjunction with drawings and embodiments.
[0045] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this The embodiments and simplified descriptions of the invention do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed a...
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