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发明名称
Perfectionnements aux machines pour l'extraction du charbon et d'autres matières minérales
摘要
申请公布号
FR1325221(A)
申请公布日期
1963.04.26
申请号
FR19620896795
申请日期
1962.05.08
申请人
MAVOR & COULSON LIMITED
发明人
分类号
E21C35/20
主分类号
E21C35/20
代理机构
代理人
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