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发明名称
A SLEEVE FOR ORIENTATING A TOOL
摘要
申请公布号
EP0862680(A1)
申请公布日期
1998.09.09
申请号
EP19960934199
申请日期
1996.10.25
申请人
DHT TECHNOLOGIES LTD.
发明人
MCLEOD, GAVIN, THOMAS
分类号
E21B10/64;E21B23/00;(IPC1-7):E21B23/00;E21B17/02
主分类号
E21B10/64
代理机构
代理人
主权项
地址
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