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发明名称
IMPROVEMENTS IN AND RELATING TO PHOTOGRAPHIC EXPOSURE MASKS
摘要
申请公布号
GB2122761(B)
申请公布日期
1986.02.05
申请号
GB19820017048
申请日期
1982.06.11
申请人
* DURST
发明人
JOHN GEOFFREY * LONG
分类号
G03B27/58;(IPC1-7):G03B27/58;G03B1/00
主分类号
G03B27/58
代理机构
代理人
主权项
地址
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