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发明名称
DEVICE FOR PRODUCING BOREHOLES AT AN INACCESSIBLE CROSS-SECTION
摘要
申请公布号
EP0169393(B1)
申请公布日期
1989.06.07
申请号
EP19850107857
申请日期
1985.06.25
申请人
MTS MINITUNNELSYSTEME GMBH
发明人
PFEIFFER, LUDWIG
分类号
E21D9/10;E21B7/20
主分类号
E21D9/10
代理机构
代理人
主权项
地址
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