Convenient to detach's observation window for civil air defense engineering

The utility model discloses a convenient to detach's observation window for civil air defense engineering, including the mount, the bottom of mount is provided with the second cavity, be provided withspiral shell rasp bar in the second cavity, spiral shell rasp bar's both ends are rotated...

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Bibliographische Detailangaben
1. Verfasser:	SUN XIWANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL FIXED CONSTRUCTIONS FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES LADDERS
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