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发明名称
Appareil éducatif auto-correctif pour les tracés de figures géométriques
摘要
申请公布号
FR1542990(A)
申请公布日期
1968.10.18
申请号
FR19670125379
申请日期
1967.10.23
申请人
发明人
JOSSE JEAN ROBERT
分类号
G09B23/04
主分类号
G09B23/04
代理机构
代理人
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