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发明名称
APPARATUS FOR DIRECTIONAL DRILLING
摘要
申请公布号
EP1285145(B1)
申请公布日期
2005.04.20
申请号
EP20010939678
申请日期
2001.05.29
申请人
SMITH, MICHAEL GERALD;HICKS, MELVIN FLOIS
发明人
SMITH, MICHAEL GERALD;HICKS, MELVIN FLOIS
分类号
E21B10/20;E21B10/28;(IPC1-7):E21B10/28
主分类号
E21B10/20
代理机构
代理人
主权项
地址
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