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发明名称
Aktivierte Glühkathode.
摘要
申请公布号
AT146302(B)
申请公布日期
1936.06.25
申请号
ATD146302
申请日期
1935.04.17
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
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主分类号
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