CHECK VALVE FOR WELL HEADS,申请号SU19813355121-传众专利搜索

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发明名称	CHECK VALVE FOR WELL HEADS
摘要
申请公布号	SU1133377(A1)	申请公布日期	1985.01.07
申请号	SU19813355121	申请日期	1981.11.12
申请人	IVANOV IVAN G,SU;REVYAKINA TAMARA,SU	发明人	IVANOV IVAN G,SU;REVYAKINA TAMARA I,SU
分类号	E21B33/03;(IPC1-7):E21B33/03	主分类号	E21B33/03
代理机构		代理人
主权项
地址

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