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发明名称
Relais à retardement pour émissions sonores
摘要
申请公布号
FR733423(A)
申请公布日期
1932.10.05
申请号
FRD733423
申请日期
1931.06.06
申请人
RADIO CINEMA
发明人
GAUMONT LEON
分类号
G10K15/10;H04R27/00
主分类号
G10K15/10
代理机构
代理人
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地址
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