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发明名称
Procédé perfectionné pour l'enrichissement des minerais
摘要
申请公布号
FR711984(A)
申请公布日期
1931.09.22
申请号
FRD711984
申请日期
1930.06.04
申请人
OFFICE CHERIFIEN DES PHOSPHATES
发明人
PRANDIERES MAURICE-CHARLES-MARI DE
分类号
B03B1/00
主分类号
B03B1/00
代理机构
代理人
主权项
地址
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