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发明名称
Vorrichtung zum akustisch-optischen Unterricht
摘要
申请公布号
DE1240314(B)
申请公布日期
1967.05.11
申请号
DE196400G1155
申请日期
1964.07.23
申请人
MAX GRUNDIG
发明人
SCHILLING FERDINAND
分类号
G09B5/06
主分类号
G09B5/06
代理机构
代理人
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地址
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