Civil air defense closed sleeve
The utility model discloses a civil air defense closed sleeve. The device comprises a wall, a movable pipe and a second airbag, a protection pipe is arranged on the inner side of the wall body; a closed sleeve main body is arranged on the inner side of the protection pipe; a covered channel is forme...
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Main Author | |
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Format | Patent |
Language | Chinese English |
Published |
24.11.2020
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Subjects | |
Online Access | Get full text |
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