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经营范围
发明名称
HOLE OPENER
摘要
申请公布号
EP0176180(B1)
申请公布日期
1988.11.30
申请号
EP19850305111
申请日期
1985.07.18
申请人
DIAMANT BOART SOCIETE ANONYME
发明人
SIMPSON, NEIL ANDREW ABERCROMBIE;EDDISON, ALAN MARTYN;MILLAR, IAN ALEXANDER
分类号
E21B10/26;E21B10/60;(IPC1-7):E21B10/26
主分类号
E21B10/26
代理机构
代理人
主权项
地址
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