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发明名称
Downhole swivel sub
摘要
申请公布号
GB0507639(D0)
申请公布日期
2005.05.25
申请号
GB20050007639
申请日期
2005.04.15
申请人
CALEDUS LIMITED
发明人
分类号
E21B17/05
主分类号
E21B17/05
代理机构
代理人
主权项
地址
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