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发明名称
Verfahren und Vorrichtung zum Umschalten von selbstspielenden Musikwerken
摘要
申请公布号
DE506400(C)
申请公布日期
1930.09.03
申请号
DE1929P059398D
申请日期
1929.01.05
申请人
POPPER & CO. G.M.B.H.
发明人
分类号
主分类号
代理机构
代理人
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