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发明名称
Perfectionnements aux pellicules photographiques
摘要
申请公布号
FR751702(A)
申请公布日期
1933.09.08
申请号
FRD751702
申请日期
1933.03.01
申请人
W. M. STILL & SONS LIMITED
发明人
HOWELL JOHN LLOYD
分类号
G03C1/795
主分类号
G03C1/795
代理机构
代理人
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