Automatic tension control systems for oil well drill lines,申请号US19620203684-传众专利搜索

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发明名称	Automatic tension control systems for oil well drill lines
摘要
申请公布号	US3265359(A)	申请公布日期	1966.08.09
申请号	US19620203684	申请日期	1962.06.07
申请人	BOWDEN J E	发明人	BOWDEN J. E.
分类号	E21B19/08	主分类号	E21B19/08
代理机构		代理人
主权项
地址

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