,申请号DE19702018778-传众专利搜索

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发明名称
摘要
申请公布号	DE2018778(A1)	申请公布日期	1971.12.30
申请号	DE19702018778	申请日期	1970.04.18
申请人		发明人
分类号	E21D9/10;(IPC1-7):E21C27/00	主分类号	E21D9/10
代理机构		代理人
主权项
地址

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