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发明名称
Dispositif aux obturateurs d'objectifs photographiques pour le réglage de l'exposition lumineuse
摘要
申请公布号
FR826411(A)
申请公布日期
1938.03.31
申请号
FRD826411
申请日期
1937.09.07
申请人
发明人
WOLF JACQUES
分类号
G03B7/04
主分类号
G03B7/04
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