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发明名称
Improvements relating to screen holders for photo-lithographic equipment
摘要
申请公布号
GB721699(A)
申请公布日期
1955.01.12
申请号
GB19520010145
申请日期
1952.04.22
申请人
PICTORIAL MACHINERY LIMITED
发明人
SPRIGGS JOHN ERIC
分类号
G03F5/02
主分类号
G03F5/02
代理机构
代理人
主权项
地址
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