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发明名称
Dispositif de reproduction pour films sonores à tracés sonores sur différentes faces du film
摘要
申请公布号
FR821439(A)
申请公布日期
1937.12.04
申请号
FRD821439
申请日期
1937.05.04
申请人
I. G. FARBENINDUSTRIE AKTIENGESELLSCHAFT
发明人
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主分类号
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