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发明名称
Perfectionnement aux appareils de soutènement pour mines
摘要
申请公布号
FR1211437(A)
申请公布日期
1960.03.16
申请号
FRD1211437
申请日期
1958.07.15
申请人
DOWTY MINING EQUIPMENT LIMITED
发明人
分类号
E21D23/08
主分类号
E21D23/08
代理机构
代理人
主权项
地址
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