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发明名称
Viseurs pour appareils photographiques
摘要
申请公布号
FR848209(A)
申请公布日期
1939.10.25
申请号
FRD848209
申请日期
1938.12.30
申请人
VALSTS ELEKTROTECHNISKA FABRIKA
发明人
分类号
G02B23/14
主分类号
G02B23/14
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