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发明名称
Photoengraving
摘要
申请公布号
US2136176(A)
申请公布日期
1938.11.08
申请号
US19370172054
申请日期
1937.10.30
申请人
THE VARNISH PRODUCTS COMPANY
发明人
HAMMOND JOHN M.
分类号
G03C11/12
主分类号
G03C11/12
代理机构
代理人
主权项
地址
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