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发明名称
Photoenlarger
摘要
申请公布号
US2176625(A)
申请公布日期
1939.10.17
申请号
US19370146675
申请日期
1937.06.05
申请人
DAVID FRIEDMAN
发明人
FRIEDMAN DAVID
分类号
G03B27/32
主分类号
G03B27/32
代理机构
代理人
主权项
地址
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