Waterproof alarm device for archival repository

The utility model discloses a waterproof alarm device for an archival repository, which belongs to the technical field of archival repository supplies and comprises a door frame and a terrace, the door frame is fixedly connected to the terrace, a doorsill is mounted at the bottom end of the inner si...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WU HONGYAN, WU HONGSHU
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALARM SYSTEMS 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 ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
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