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经营范围
发明名称
Perfectionnements à la fabrication de matières artificielles
摘要
申请公布号
FR687471(A)
申请公布日期
1930.08.08
申请号
FRD687471
申请日期
1929.12.31
申请人
发明人
DREYFUS HENRY
分类号
D01F2/28
主分类号
D01F2/28
代理机构
代理人
主权项
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