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经营范围
发明名称
Foreuse de mine à goupilles de sécurité
摘要
申请公布号
FR1508154(A)
申请公布日期
1968.01.05
申请号
FR19660079906
申请日期
1966.10.13
申请人
NATIONAL MINE SERVICE COMPANY
发明人
分类号
E21C27/22
主分类号
E21C27/22
代理机构
代理人
主权项
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