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发明名称
Procédé pour l'exploitation d'une taille à l'aide d'un outil d'abatage, et outil utilisable pour sa mise en oeuvre
摘要
申请公布号
FR1450063(A)
申请公布日期
1966.05.06
申请号
FR19650034199
申请日期
1965.10.08
申请人
FIRMA GEWERKSCHAFT EISENHUETTE WESTFALIA
发明人
分类号
E21C27/34
主分类号
E21C27/34
代理机构
代理人
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