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发明名称
Elektrode med Evne til stærk Sekundæremission og Fremgangsmaade til dens Fremstilling.
摘要
申请公布号
DK55039(C)
申请公布日期
1938.08.01
申请号
DKD55039
申请日期
1937.02.06
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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