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发明名称
DRILL STRING MEMBER WITH BEARINGS
摘要
申请公布号
EP1226329(A2)
申请公布日期
2002.07.31
申请号
EP20000964521
申请日期
2000.10.06
申请人
INTERNATIONAL TUBULAR SERVICES LIMITED
发明人
APPLETON, ROBERT, PATRICK
分类号
E21B17/10;(IPC1-7):E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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