Colliery is empty unrestrained filtration water control devices of water always

The utility model discloses a colliery is empty unrestrained filtration water control devices of water always, including transverse sheath pipe, vertical sleeve pipe, vertical steel pipe and control gate valve, the transverse sheath pipe is in the same place with vertical sleeve pipe vertical weldin...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG LIN, CAO SHUAI, HOU SHANGWU, DU ZHIYUAN, JIANG JINGXIAO, CHEN PENGFEI, SONG YAYA, MI GUANGFENG, MU LEI, LIU SHENGJIE, ZHAO LONGGANG, YU JIWEI, CHEN BING, WANG HUI
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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