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发明名称
Dispositif indicateur de réponses à choix multiple et auto-correcteur instantané
摘要
申请公布号
FR1496555(A)
申请公布日期
1967.09.29
申请号
FR19660079843
申请日期
1966.10.13
申请人
发明人
DAVENPORT ALVAN FRANCIS
分类号
G09B3/08
主分类号
G09B3/08
代理机构
代理人
主权项
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