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发明名称
Verfahren und Vorrichtung zur Zentrierung eines Elements
摘要
申请公布号
DE602005008296(D1)
申请公布日期
2008.09.04
申请号
DE200560008296T
申请日期
2005.03.17
申请人
NATIONAL-OILWELL, L.P.
发明人
DRZEWIECKI, LOPEK
分类号
E21B19/24
主分类号
E21B19/24
代理机构
代理人
主权项
地址
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