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发明名称
Apparatus & method
摘要
申请公布号
GB0404458(D0)
申请公布日期
2004.03.31
申请号
GB20040004458
申请日期
2004.03.01
申请人
ZENITH OILFIELD TECHNOLOGY LIMITED
发明人
分类号
E21B43/12;E21B47/00;E21B47/09
主分类号
E21B43/12
代理机构
代理人
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