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发明名称
VORRICHTUNG ZUR HERSTELLUNG INDIREKT HEIZBARER KATHODEN FUER ELEKTRISCHE ENTLADUNGSROEHREN.
摘要
申请公布号
DE1738684(U)
申请公布日期
1957.01.31
申请号
DE195600N6355U
申请日期
1956.03.03
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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