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发明名称
VERFAHREN ZUR DURCHFUEHRUNG UNTERIRDISCHER ARBEITEN
摘要
申请公布号
DE2353196(A1)
申请公布日期
1975.01.02
申请号
DE19732353196
申请日期
1973.10.24
申请人
SEVENE,JEAN-PIERRE
发明人
NICHTNENNUNG BEANTRAGT
分类号
E21D9/00;(IPC1-7):E21D21/00
主分类号
E21D9/00
代理机构
代理人
主权项
地址
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