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发明名称
Cutting insert for drag drill bit
摘要
申请公布号
EP0733778(B1)
申请公布日期
2000.10.25
申请号
EP19960301963
申请日期
1996.03.21
申请人
CAMCO DRILLING GROUP LIMITED
发明人
MATTHIAS, TERRY R.
分类号
E21B10/56;E21B10/573;(IPC1-7):E21B10/56
主分类号
E21B10/56
代理机构
代理人
主权项
地址
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