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经营范围
发明名称
Tube électronique.
摘要
申请公布号
CH254935(A)
申请公布日期
1948.05.31
申请号
CHD254935
申请日期
1946.04.29
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
GLOEILAMPENFABRIEKEN N. V. PHILIPS'
分类号
H01J7/44;H01J19/66;H01J19/78
主分类号
H01J7/44
代理机构
代理人
主权项
地址
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