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发明名称
Selbstspielendes Klavier mit Lautsprecher
摘要
申请公布号
DE525138(C)
申请公布日期
1931.05.19
申请号
DE1929Z018314D
申请日期
1929.04.26
申请人
ARTHUR EDWARD ZOPPA
发明人
分类号
主分类号
代理机构
代理人
主权项
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