Double-leaf protection closed door for large underground space cave entrance

Bibliographische Detailangaben

Hauptverfasser:	GUO SHENGBING, HU YUJING, LIU BINSHENG, XIE YUXIN, ZHANG WEIGANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACCESSORIES THEREFOR 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 HANDCUFFS KEYS LADDERS LOCKS SAFES WINDOW OR DOOR FITTINGS
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