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发明名称
OBERE ANTRIEBSVORRICHTUNG
摘要
<p>A clamp for clamping to two threadedly-connected items, and, in one aspect, two threadedly-connected components of a top drive system.</p>
申请公布号
DE602008002417(D1)
申请公布日期
2010.10.14
申请号
DE20086002417T
申请日期
2008.03.14
申请人
NATIONAL-OILWELL VARCO L.P.
发明人
YATER, RONALD WILLIAM;WELLS, LAWRENCE E.;WEST, NEIL EDWARD;SWIONTEK, CLIFF;ERVIN, HOWARD
分类号
E21B3/02;E21B19/16
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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