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经营范围
发明名称
DRILLING DEVICE
摘要
申请公布号
EP0938623(A1)
申请公布日期
1999.09.01
申请号
EP19970947085
申请日期
1997.11.18
申请人
ETABLISSEMENTS MONTABERT
发明人
CADET, BERNARD
分类号
E21B44/00;E21B44/06;(IPC1-7):E21B44/00
主分类号
E21B44/00
代理机构
代理人
主权项
地址
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