Apparatus for drilling oil wells,申请号GB19610023996-传众专利搜索

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发明名称	Apparatus for drilling oil wells
摘要
申请公布号	GB945408(A)	申请公布日期	1963.12.23
申请号	GB19610023996	申请日期	1961.07.03
申请人	JOSEPH VINCENT O'NEILL	发明人
分类号	E21B7/02;E21B19/20	主分类号	E21B7/02
代理机构		代理人
主权项
地址

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