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发明名称
Improvements in or relating to electron discharge tubes
摘要
申请公布号
GB402294(A)
申请公布日期
1933.11.30
申请号
GB19330007055
申请日期
1933.03.08
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H01J19/30
主分类号
H01J19/30
代理机构
代理人
主权项
地址
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