PENETRATING PIPE REDUCER AND METHOD OF SELING IT IN LIFTING CASINGS,申请号PL19840248103-传众专利搜索

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发明名称	PENETRATING PIPE REDUCER AND METHOD OF SELING IT IN LIFTING CASINGS
摘要
申请公布号	PL144266(B1)	申请公布日期	1988.05.31
申请号	PL19840248103	申请日期	1984.06.06
申请人		发明人
分类号	E21B;E21B43/00;E21B43/32;(IPC1-7):E21B43/00	主分类号	E21B
代理机构		代理人
主权项
地址

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