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经营范围
发明名称
BORKRONE.
摘要
申请公布号
NO892223(D0)
申请公布日期
1989.06.01
申请号
NO19890002223
申请日期
1989.06.01
申请人
BOART INTERNATIONAL LIMITED
发明人
TYLER, VINCENT CUNNINGHAM
分类号
E21B10/38;E21B10/56;(IPC1-7):E21B/
主分类号
E21B10/38
代理机构
代理人
主权项
地址
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