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发明名称
PERIODIC FOCUSING SYSTEM
摘要
申请公布号
GB9309810(D0)
申请公布日期
1993.06.23
申请号
GB19930009810
申请日期
1993.05.12
申请人
LITTON SYSTEMS INC
发明人
分类号
H01J23/00;H01J23/087;H01J25/34
主分类号
H01J23/00
代理机构
代理人
主权项
地址
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