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发明名称
Improvements in photo-mechanical silk-screen printing processes
摘要
申请公布号
GB641545(A)
申请公布日期
1950.08.16
申请号
GB19460024339
申请日期
1946.08.15
申请人
DAN WALKER;DAVID EVANS & COMPANY LIMITED
发明人
分类号
G03F7/12
主分类号
G03F7/12
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代理人
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