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发明名称
Procédé de synchronisation de films et de machines parlantes
摘要
申请公布号
FR674704(A)
申请公布日期
1930.01.31
申请号
FRD674704
申请日期
1929.05.07
申请人
发明人
NEISS HEINRICH
分类号
G03B31/00;H04N3/36
主分类号
G03B31/00
代理机构
代理人
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