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发明名称
Elektrische Entladungsroehre
摘要
申请公布号
DE550178(C)
申请公布日期
1932.05.12
申请号
DE1928N028417D
申请日期
1928.02.11
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
BOER JAN HENDRIK DE
分类号
H01J7/18;H01J19/30
主分类号
H01J7/18
代理机构
代理人
主权项
地址
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