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发明名称
Drill pipe torque reduction and protection apparatus
摘要
申请公布号
GB0002916(D0)
申请公布日期
2000.03.29
申请号
GB20000002916
申请日期
2000.02.10
申请人
STABLE SERVICES LIMITED
发明人
分类号
E21B17/10
主分类号
E21B17/10
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代理人
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