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发明名称
Appareil d'enseignement à affichage visuel
摘要
申请公布号
FR1541061(A)
申请公布日期
1968.10.04
申请号
FR19670118415
申请日期
1967.08.21
申请人
SIGHT AND SOUND EDUCATION LIMITED
发明人
PARKES JAMES
分类号
G09B13/00
主分类号
G09B13/00
代理机构
代理人
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