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经营范围
发明名称
Perfectionnements aux appareils récepteurs et reproducteurs des sons
摘要
申请公布号
FR729917(A)
申请公布日期
1932.08.03
申请号
FRD729917
申请日期
1931.03.24
申请人
发明人
ANDIA VICTOR DE
分类号
G11B33/06
主分类号
G11B33/06
代理机构
代理人
主权项
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