DRILLING COLUMN SEPARATOR,申请号SU19721737885-传众专利搜索

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发明名称	DRILLING COLUMN SEPARATOR
摘要
申请公布号	SU618526(A1)	申请公布日期	1978.08.05
申请号	SU19721737885	申请日期	1972.01.17
申请人	VNII BUROVOJ TEKHNIKI	发明人	NIKITIN YURIJ YU,SU;VASILEV YURIJ S,SU
分类号	E21B17/00;(IPC1-7):E21B17/00	主分类号	E21B17/00
代理机构		代理人
主权项
地址

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