DRILLING STRING HOLDING MECHANISM,申请号SU19741982668-传众专利搜索

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发明名称	DRILLING STRING HOLDING MECHANISM
摘要
申请公布号	SU595483(A1)	申请公布日期	1978.02.28
申请号	SU19741982668	申请日期	1974.01.02
申请人	VNII METODIKI TEKHNIKI RAZVEDKI	发明人	LYS FEDOR S,SU;SILAGADZE DAVID E,SU
分类号	E21B19/10;(IPC1-7):E21B19/10	主分类号	E21B19/10
代理机构		代理人
主权项
地址

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