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发明名称
Viseur clair à champ et à grossissement variables pour appareils de prises de vuescinématographiques et appareils photographiques
摘要
申请公布号
FR867912(A)
申请公布日期
1941.12.05
申请号
FRD867912
申请日期
1940.12.04
申请人
发明人
HELIARD FRANCOIS, MARIE, PAUL
分类号
G02B15/14
主分类号
G02B15/14
代理机构
代理人
主权项
地址
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