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经营范围
发明名称
Improvements in or relating to electric discharge tubes
摘要
申请公布号
GB472307(A)
申请公布日期
1937.09.21
申请号
GB19370013882
申请日期
1937.05.18
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H01J61/28
主分类号
H01J61/28
代理机构
代理人
主权项
地址
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