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发明名称
Photomechanical printing frame
摘要
申请公布号
US2534784(A)
申请公布日期
1950.12.19
申请号
US19490070212
申请日期
1949.01.11
申请人
POWERS PHOTO ENGRAVING COMPANY
发明人
MAXWELL JOHN D.
分类号
G03B27/02
主分类号
G03B27/02
代理机构
代理人
主权项
地址
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