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发明名称
Dispositif pour l'exploitation des mines
摘要
申请公布号
FR1389393(A)
申请公布日期
1965.02.12
申请号
FR19640971757
申请日期
1964.04.21
申请人
DOWTY MINING EQUIPMENT LIMITED
发明人
分类号
E21D23/26
主分类号
E21D23/26
代理机构
代理人
主权项
地址
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