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发明名称
Easel for photographic enlargers
摘要
申请公布号
US2596811(A)
申请公布日期
1952.05.13
申请号
US19490069665
申请日期
1949.01.07
申请人
CARLSON ORLYN M
发明人
CARLSON ORLYN M.
分类号
G03B27/60
主分类号
G03B27/60
代理机构
代理人
主权项
地址
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