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发明名称
Brönnverktöy for styring av borekursen til et borehull
摘要
申请公布号
NO306632(B1)
申请公布日期
1999.11.29
申请号
NO19940003265
申请日期
1994.09.02
申请人
LEDGE 101 LTD
发明人
WEBSTER, DAVID WADE
分类号
E21B7/06;E21B17/10;E21B44/00;(IPC1-7):E21B7/06
主分类号
E21B7/06
代理机构
代理人
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