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发明名称
Elektrisk Udladningsrør med Sekundæremissionselektrode.
摘要
申请公布号
DK56111(C)
申请公布日期
1939.05.01
申请号
DKD56111
申请日期
1938.03.26
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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