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发明名称
Perfectionnements aux systèmes de distributions électro-acoustiques et aux dispositifs y afférents
摘要
申请公布号
FR753688(A)
申请公布日期
1933.10.21
申请号
FRD753688
申请日期
1932.11.08
申请人
发明人
ALTSCHULER SIMON
分类号
H04H20/82
主分类号
H04H20/82
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代理人
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