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发明名称
Dispositif d'enregistrement et de reproduction des sons
摘要
申请公布号
FR929570(A)
申请公布日期
1947.12.31
申请号
FRD929570
申请日期
1946.06.21
申请人
发明人
PROT ETIENNE-MARCEL
分类号
G11B27/13
主分类号
G11B27/13
代理机构
代理人
主权项
地址
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