Device for installing freezing pipe in inclined freezing hole

The invention relates to a device for installing a freezing pipe in an inclined freezing hole. The device is characterized by comprising an adapter connector, an upper center tube and a lower center tube. The upper center tube is provided with a pair of conical roller bearings, inner rings of the be...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	PU CHAOYANG, DENG YUN, YANG XUE, LI SHANGZE, SHAO GONGYU, DONG XINWANG, YUAN HUI
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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