,申请号CS19710008311-传众专利搜索

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发明名称
摘要
申请公布号	CS152204(B1)	申请公布日期	1973.12.19
申请号	CS19710008311	申请日期	1971.11.30
申请人		发明人
分类号	E21B17/08;(IPC1-7):E21B17/08	主分类号	E21B17/08
代理机构		代理人
主权项
地址

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