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发明名称
APPARATUS AND METHOD FOR ROTARY BORED DRILLING
摘要
申请公布号
EP1392952(A1)
申请公布日期
2004.03.03
申请号
EP20020732890
申请日期
2002.05.29
申请人
HIGH MEAD DEVELOPMENTS LIMITED
发明人
HOLLINGSWORTH, JOHN, RICHARD;UNSWORTH, JAMES, MICHAEL
分类号
E21B7/00;E21B10/64;E21B17/02;(IPC1-7):E21B10/64
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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