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发明名称
Improvements relating to the mounting of cathodes in electron discharge devices
摘要
申请公布号
GB497563(A)
申请公布日期
1938.12.21
申请号
GB19380017321
申请日期
1938.06.10
申请人
STANDARD TELEPHONES & CABLES LIMITED
发明人
分类号
H01J21/06
主分类号
H01J21/06
代理机构
代理人
主权项
地址
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