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发明名称
Procédé et dispositif pour l'extraction du charbon et autres minéraux
摘要
申请公布号
FR1191358(A)
申请公布日期
1959.10.19
申请号
FRD1191358
申请日期
1957.12.20
申请人
STAHLWERKE BRUENINGHAUS G. M. B. H.
发明人
分类号
E21C27/38
主分类号
E21C27/38
代理机构
代理人
主权项
地址
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