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发明名称
VORRICHTUNG UND VERFAHREN ZUM ZURÜCKHOLEN VON OBJEKTEN AUS EINEM BOHRLOCH
摘要
申请公布号
DE69738110(D1)
申请公布日期
2007.10.18
申请号
DE19976038110
申请日期
1997.07.03
申请人
WEATHERFORD/LAMB INC.
发明人
HAWN, CLIFFORD W.;BEEMAN, ROBERT STEPHEN
分类号
E21B31/20;E21B31/18
主分类号
E21B31/20
代理机构
代理人
主权项
地址
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