Improvements in drill pipe raising apparatus,申请号GB19670045713-传众专利搜索

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发明名称	Improvements in drill pipe raising apparatus
摘要
申请公布号	GB1133744(A)	申请公布日期	1968.11.13
申请号	GB19670045713	申请日期	1966.01.18
申请人	BECKER DRILLING (ALBERTA) LTD.	发明人	BECKER NORMAN DONALD;BECKER FLOYD WALTER
分类号	E21B19/00;E21B21/12	主分类号	E21B19/00
代理机构		代理人
主权项
地址

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