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经营范围
发明名称
Rolling cutter drill bits.
摘要
申请公布号
EP0593268(A3)
申请公布日期
1995.02.08
申请号
EP19930308134
申请日期
1993.10.12
申请人
REED TOOL CO
发明人
HARRELL PATRICIA N
分类号
E21B10/16;E21B10/52;(IPC1-7):E21B10/16
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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