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经营范围
发明名称
Perfectionnements aux foreuses de mines
摘要
申请公布号
FR966891(A)
申请公布日期
1950.10.20
申请号
FRD966891
申请日期
1948.05.27
申请人
发明人
FERON JACQUES
分类号
E21B19/081
主分类号
E21B19/081
代理机构
代理人
主权项
地址
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