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发明名称
LERNVORRICHTUNG ZUR SELBST- UND SOFORTKONTROLLE VON ANTWORTEN AUF AUFGABENSTELLUNGEN
摘要
申请公布号
AT395220(B)
申请公布日期
1992.10.27
申请号
AT19900000624
申请日期
1990.03.15
申请人
KUHN FRANZ-JOSEF
发明人
分类号
G09B3/02
主分类号
G09B3/02
代理机构
代理人
主权项
地址
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