,申请号RO19680056681-传众专利搜索

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发明名称
摘要
申请公布号	RO52164(A2)	申请公布日期	1977.04.15
申请号	RO19680056681	申请日期	1968.05.10
申请人		发明人
分类号	E21B19/10;(IPC1-7):E21B1/00	主分类号	E21B19/10
代理机构		代理人
主权项
地址

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