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发明名称
Enregistreur électro-magnétique à usages multiples, combiné avec un phonographe électrique et un récepteur de radio
摘要
申请公布号
FR717711(A)
申请公布日期
1932.01.13
申请号
FRD717711
申请日期
1930.09.12
申请人
发明人
THURM LEON
分类号
G11B31/00
主分类号
G11B31/00
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代理人
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