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发明名称
Elektronudladningsapparat med en kold katode, der emitterer i et elektrisk felt.
摘要
申请公布号
DK70172(C)
申请公布日期
1949.11.07
申请号
DK19460003422
申请日期
1946.09.06
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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