Mining ventilation air door

The utility model relates to the technical field of mine ventilation air doors, and discloses a mine ventilation air door which comprises an air pipe, an annular groove is formed in the inner wall of one end of the air pipe, a gear ring is rotatably arranged in the annular groove, a second sieve pla...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHANG ZHAOHUA, WANG YUE, SUN LIUYONG, LI WENHUI, SUN ZEYAN, WANG SHENGYONG, WEN SHOUJIE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS MINING SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS
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