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经营范围
发明名称
Procédé d'enrichissement des minerais de fer
摘要
申请公布号
FR55972(E)
申请公布日期
1952.09.10
申请号
FRD55972
申请日期
1945.04.12
申请人
发明人
PAUL ROGER-ANTOINE-EUGENE
分类号
B03B1/02;C22B1/02;C22B1/14
主分类号
B03B1/02
代理机构
代理人
主权项
地址
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