Suspension type dual-stage stretchable individual hydraulic prop

The utility model belongs to hydraulic props, and particularly relates to a suspension type dual-stage stretchable individual hydraulic prop. A first-grade oil cylinder is installed in a second-grade oil cylinder, a base is connected with a groove in the lower end of the second-grade oil cylinder to...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHEN HAIJUN, ZHANG XIAOWEI, ZHANG HUICHUN, LIU BAOLIANG, ZHAO JIAQING, LIU HUIJUAN, LI BO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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