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发明名称
Apparatus and method
摘要
申请公布号
GB0506031(D0)
申请公布日期
2005.04.27
申请号
GB20050006031
申请日期
2005.03.24
申请人
DOWNHOLE PRODUCTS PLC
发明人
分类号
E21B17/10;E21B17/22;E21B21/00
主分类号
E21B17/10
代理机构
代理人
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