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发明名称
Vakuumrør eller lignende, der bestaar af en Glasdel, som er sammensmeltet med en ring- eller skiveformet Metaldel langs dennes Rand.
摘要
申请公布号
DK45350(C)
申请公布日期
1932.03.07
申请号
DKD45350
申请日期
1930.05.05
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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