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发明名称
TEACHING PANEL FOR REPEATING AND EVALUATING THE KNOWLEDGES
摘要
申请公布号
CS196532(B1)
申请公布日期
1980.03.31
申请号
CS19750000189
申请日期
1975.01.10
申请人
KONECNY,JIRI,CS
发明人
KONECNY,JIRI,CS
分类号
G09B1/04;(IPC1-7):G09B1/04
主分类号
G09B1/04
代理机构
代理人
主权项
地址
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