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发明名称
PROCESS AND DEVICE FOR TUNNEL DRILLING RECONNAISSANCE
摘要
申请公布号
GB2187223(B)
申请公布日期
1989.11.08
申请号
GB19870004186
申请日期
1987.02.23
申请人
* SOLETANCHE S A
发明人
RAYMOND * RAMI
分类号
E21B33/12;E21B17/22;E21B47/00;E21C39/00;E21D9/00
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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