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发明名称
Down-hole tool with detachable cleaning pads
摘要
申请公布号
GB9813422(D0)
申请公布日期
1998.08.19
申请号
GB19980013422
申请日期
1998.06.23
申请人
SPECIALISED PETROLEUM SERVICES LIMITED
发明人
分类号
E21B17/10;E21B37/02
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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