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经营范围
发明名称
Procédé d'enregistrement et de reproduction phonographique
摘要
申请公布号
FR740740(A)
申请公布日期
1933.01.31
申请号
FRD740740
申请日期
1931.10.30
申请人
发明人
BLANC ALFRED
分类号
G11B5/00
主分类号
G11B5/00
代理机构
代理人
主权项
地址
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