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经营范围
发明名称
CUTTER PICK
摘要
申请公布号
GB8824923(D0)
申请公布日期
1988.11.30
申请号
GB19880024923
申请日期
1988.10.25
申请人
DE BEERS INDUSTRIAL DIAMOND DIVISION (PTY) LTD
发明人
分类号
E21B10/56;E21B10/567;E21C35/18;E21C35/183;E21C35/187;(IPC1-7):E21C35/18
主分类号
E21B10/56
代理机构
代理人
主权项
地址
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