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发明名称
Perfectionnements apportés à la préparation des bandes ou films à enregistrementphotographique du son
摘要
申请公布号
FR709052(A)
申请公布日期
1931.08.03
申请号
FRD709052
申请日期
1931.01.08
申请人
发明人
BENNETT DOUGLAS TEMPLE
分类号
G11B7/00
主分类号
G11B7/00
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