Telescopic system capable of preventing core tube from inhaling empty and crane

The invention relates to a telescopic system capable of preventing a core tube from inhaling empty and a crane, wherein the telescopic system capable of preventing the core tube from inhaling empty comprises a telescopic cylinder, a telescopic control valve, a switch valve, a cylinder pin cylinder,...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	QI HOUBAO, WANG DONG, WANG SHOUWEI, REN YINMEI, ZHOU FEIPENG
Format:	Patent
Sprache:	eng
Schlagworte:	CRANES HAULING HOISTING LIFTING LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES PERFORMING OPERATIONS TRANSPORTING
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