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发明名称
Adjustable filter darkroom light
摘要
申请公布号
US2545274(A)
申请公布日期
1951.03.13
申请号
US19470756978
申请日期
1947.06.25
申请人
GOLDEN ALTON H
发明人
GOLDEN ALTON H.
分类号
G03D17/00
主分类号
G03D17/00
代理机构
代理人
主权项
地址
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