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发明名称
Fremgangsmåte ved boring
摘要
申请公布号
NO20013584(D0)
申请公布日期
2001.07.20
申请号
NO20010003584
申请日期
2001.07.20
申请人
WEATHERFORD/LAMB INC
发明人
MOYES, PETER BARNES
分类号
E21B4/02;E21B21/00;E21B21/08;(IPC1-7):E21B
主分类号
E21B4/02
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代理人
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