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发明名称
TARGET-DIRECTED DRILLING ROD FOR ROTATING BORING TOOLS WITH FLUSHING DUCT FOR UNDERGROUND MINING
摘要
申请公布号
EP0134467(A3)
申请公布日期
1985.07.03
申请号
EP19840107700
申请日期
1984.07.03
申请人
BERGWERKSVERBAND GMBH;SCHWING HYDRAULIK ELEKTRONIK GMBH & CO.
发明人
WALLUSSEK, HEINZ, DIPL.-ING.;WIEBE, MARTIN, DIPL.-ING.
分类号
E21B47/20;E21B7/04;E21B7/06;E21B17/18;E21B44/00;E21B47/02;E21B47/022;E21B47/18;(IPC1-7):E21B47/12
主分类号
E21B47/20
代理机构
代理人
主权项
地址
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