CONTROLLABLE VALVE FOR DRILLING PIPES,申请号SU19752161936-传众专利搜索

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发明名称	CONTROLLABLE VALVE FOR DRILLING PIPES
摘要
申请公布号	SU610973(A1)	申请公布日期	1978.06.15
申请号	SU19752161936	申请日期	1975.08.11
申请人	AZERB GNI PI NEFTYANOJ PROMYSHLENNOSTI	发明人	YADULLAEV NURULLA N,SU;VINITSKIJ YURIJ N,SU
分类号	E21B17/00;E21B43/00;(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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