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发明名称
Anordning for utvidelse av borehull
摘要
申请公布号
NO178938(C)
申请公布日期
1996.07.03
申请号
NO19920001718
申请日期
1992.04.30
申请人
TANDBERG, GEIR;SANGESLAND, SIGBJOERN;ROEDLAND, ARILD
发明人
TANDBERG, GEIR;SANGESLAND, SIGBJOERN;ANDERSEN, ASBJOERN
分类号
E21B10/32;E21B17/10;(IPC1-7):E21B7/28
主分类号
E21B10/32
代理机构
代理人
主权项
地址
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