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发明名称
Electron tube cathodes
摘要
申请公布号
GB2074370(A)
申请公布日期
1981.10.28
申请号
GB19810010987
申请日期
1981.04.08
申请人
PHILIPS NV
发明人
分类号
H01J1/14;H01J1/15;(IPC1-7):H01J1/13
主分类号
H01J1/14
代理机构
代理人
主权项
地址
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