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发明名称
Appareil de démonstration pour l'enseignement de la comptabilité et de diverses théories économiques
摘要
申请公布号
FR968105(A)
申请公布日期
1950.11.20
申请号
FRD968105
申请日期
1948.06.18
申请人
发明人
MASCLET JEAN
分类号
G09B19/18
主分类号
G09B19/18
代理机构
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