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发明名称
Perfectionnements à la projection des films cinématographiques
摘要
申请公布号
FR732831(A)
申请公布日期
1932.09.26
申请号
FRD732831
申请日期
1932.03.08
申请人
发明人
INNES ROBERT THORBURN AYTON
分类号
G03B21/60
主分类号
G03B21/60
代理机构
代理人
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