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发明名称
Stable rotary drill bit
摘要
申请公布号
GB2426533(A)
申请公布日期
2006.11.29
申请号
GB20060009742
申请日期
2006.05.17
申请人
REEDHYCALOG UK LIMITED
发明人
SIMON CHRISTOPHER JOHNSON
分类号
E21B10/42;E21B10/43;E21B10/54
主分类号
E21B10/42
代理机构
代理人
主权项
地址
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