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经营范围
发明名称
Procédé de formation d'une couche active de matière fixant les gaz dans un vase à vide, notamment un tube à décharge.
摘要
申请公布号
CH255826(A)
申请公布日期
1948.07.15
申请号
CHD255826
申请日期
1946.05.02
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
GLOEILAMPENFABRIEKEN N. V. PHILIPS'
分类号
H01J7/18
主分类号
H01J7/18
代理机构
代理人
主权项
地址
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