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经营范围
发明名称
Visionneuse de poche pour photographies
摘要
申请公布号
FR1032498(A)
申请公布日期
1953.07.02
申请号
FRD1032498
申请日期
1951.02.15
申请人
发明人
SINGER FREDERICK
分类号
G02B27/02
主分类号
G02B27/02
代理机构
代理人
主权项
地址
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