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经营范围
发明名称
Machine d'exploitation des mines
摘要
申请公布号
FR1122499(A)
申请公布日期
1956.09.07
申请号
FRD1122499
申请日期
1955.04.08
申请人
COAL INDUSTRY (PATENTS) LIMITED
发明人
分类号
E21C27/46
主分类号
E21C27/46
代理机构
代理人
主权项
地址
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