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发明名称
Vorrichtung zum programmierten Lernen
摘要
申请公布号
CH460409(A)
申请公布日期
1968.07.31
申请号
CH19660002072
申请日期
1966.02.14
申请人
W. GIRARDET GRAPHISCHE BETRIEBE UND VERLAG
发明人
KUSCH,LOTHAR
分类号
G09B3/08
主分类号
G09B3/08
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代理人
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