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发明名称
PROCEDE DE CREUSEMENT DE GALERIES EN ROCHES DURES
摘要
申请公布号
LU79830(A1)
申请公布日期
1980.01.22
申请号
LU19780079830
申请日期
1978.06.16
申请人
DUBOIS M
发明人
DUBOIS M
分类号
E21D9/10;(IPC1-7):E21C/
主分类号
E21D9/10
代理机构
代理人
主权项
地址
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