,申请号DE19712107289-传众专利搜索

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发明名称
摘要
申请公布号	DE2107289(A1)	申请公布日期	1972.08.31
申请号	DE19712107289	申请日期	1971.02.16
申请人		发明人
分类号	E21C27/30;(IPC1-7):E21C27/00	主分类号	E21C27/30
代理机构		代理人
主权项
地址

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