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发明名称
APPARATO DI INSEGNAMENTO E DI APPRENDIMENTO
摘要
申请公布号
IT1033075(B)
申请公布日期
1979.07.10
申请号
IT19740022795
申请日期
1974.05.15
申请人
SONY CORP
发明人
分类号
G09B5/04;G09B5/08;G11B5/00;(IPC1-7):G09B/
主分类号
G09B5/04
代理机构
代理人
主权项
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