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发明名称
Magnettongeraet fuer das Erlernen von Sprachen und das Einueben von Musikstuecken fuer Gesang oder Instrumente
摘要
申请公布号
DE1772433(A1)
申请公布日期
1971.03.04
申请号
DE19681772433
申请日期
1968.05.15
申请人
BELL,KARL-WALTER
发明人
BELL,KARL-WALTER
分类号
G09B5/04
主分类号
G09B5/04
代理机构
代理人
主权项
地址
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