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发明名称
Perfectionnements à la reproduction des sons moyennant des films à images photographiques sonores
摘要
申请公布号
FR739788(A)
申请公布日期
1933.01.17
申请号
FRD739788
申请日期
1932.07.08
申请人
发明人
SERRA FRANCISCO
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主分类号
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