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发明名称
Procédé et appareil pour l'examen des timbres-poste pour collections et autres vignettes et documents
摘要
申请公布号
FR818947(A)
申请公布日期
1937.10.06
申请号
FRD818947
申请日期
1937.03.09
申请人
发明人
BAILLEAU LEONARD
分类号
G02B25/00
主分类号
G02B25/00
代理机构
代理人
主权项
地址
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