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发明名称
PHOTOEMISSIVE CATHODES
摘要
申请公布号
GB1589925(A)
申请公布日期
1981.05.20
申请号
GB19770008211
申请日期
1977.11.14
申请人
ENGLISH ELECTRIC VALVE CO LTD
发明人
分类号
H01J9/12;(IPC1-7):H01J9/12
主分类号
H01J9/12
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