CHECK-VALVE FOR CASING COLUMN,申请号SU19742028630-传众专利搜索

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发明名称	CHECK-VALVE FOR CASING COLUMN
摘要
申请公布号	SU569695(A1)	申请公布日期	1977.08.25
申请号	SU19742028630	申请日期	1974.05.31
申请人	VNII PO KREPLENIYU SKVAZHIN BUROVYM RASTVORAM	发明人	BULATOV ANATOLIJ ,SU;GONCHAROV ALEKSEJ N,SU;LEVIN EVGENIJ M,SU;SHLYKOV VASILIJ K,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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