Oil and gas well equipment,申请号GB19660037808-传众专利搜索

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发明名称	Oil and gas well equipment
摘要
申请公布号	GB1060968(A)	申请公布日期	1967.03.08
申请号	GB19660037808	申请日期	1964.07.07
申请人	WARREN EARL PARKHURST;CASSIUS LUDWIG TILLMAN O¾	发明人
分类号	E21B17/12	主分类号	E21B17/12
代理机构		代理人
主权项
地址

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