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发明名称
Improvements in or relating to photographic contact printing
摘要
申请公布号
GB527835(A)
申请公布日期
1940.10.17
申请号
GB19390008883
申请日期
1939.03.20
申请人
PAUL KOENIG
发明人
分类号
G03B27/22
主分类号
G03B27/22
代理机构
代理人
主权项
地址
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