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发明名称
Metode for utforing av borehull
摘要
申请公布号
NO945088(A)
申请公布日期
1996.07.01
申请号
NO19940005088
申请日期
1994.12.30
申请人
HAUGHOM, PER OLAV
发明人
HAUGHOM, PER OLAV
分类号
E21B;E21B7/20;E21B17/00;E21B43/10;(IPC1-7):E21B7/20
主分类号
E21B
代理机构
代理人
主权项
地址
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