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发明名称
DREHWIDERSTANDSBIT
摘要
申请公布号
AT534797(T)
申请公布日期
2011.12.15
申请号
AT20080725403T
申请日期
2008.02.11
申请人
BAKER HUGHES INCORPORATED
发明人
WELCH, ROBERT;FELDERHOFF, FLOYD;DOSTER, MICHAEL
分类号
E21B10/43
主分类号
E21B10/43
代理机构
代理人
主权项
地址
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