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法人/股东/高管

发明名称
摘要
申请公布号	DE2101969(A1)	申请公布日期	1971.07.22
申请号	DE19712101969	申请日期	1971.01.16
申请人		发明人
分类号	E21B10/64;E21B10/66;(IPC1-7):E21B9/26	主分类号	E21B10/64
代理机构		代理人
主权项
地址

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