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发明名称
Anordning ved boresystem
摘要
申请公布号
NO960591(A)
申请公布日期
1996.08.26
申请号
NO19960000591
申请日期
1996.02.15
申请人
CAMCO DRILLING GROUP LTD
发明人
BARR, JOHN DENZIL
分类号
E21B7/06;E21B21/10;(IPC1-7):E21B7/08
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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