DRILL STRING COUPLING,申请号SU19711678149-传众专利搜索

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发明名称	DRILL STRING COUPLING
摘要
申请公布号	SU734385(A1)	申请公布日期	1980.05.15
申请号	SU19711678149	申请日期	1971.07.06
申请人	PSHENICHNYJ PAVEL L,SU;PSHENICHNYJ IGOR P,SU	发明人	PSHENICHNYJ PAVEL L,SU;PSHENICHNYJ IGOR P,SU
分类号	E21B17/02;E21B7/08;(IPC1-7):E21B17/02	主分类号	E21B17/02
代理机构		代理人
主权项
地址

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