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经营范围
发明名称
Improvements in or relating to photographic contact printing
摘要
申请公布号
GB655768(A)
申请公布日期
1951.08.01
申请号
GB19480010292
申请日期
1948.04.13
申请人
WILLIAM CARL HUEBNER
发明人
分类号
G03F7/24
主分类号
G03F7/24
代理机构
代理人
主权项
地址
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