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发明名称
Schaltung für die Verstärkung und/oder Frequenztransformation elektrischer Schwingungen.
摘要
申请公布号
AT155521(B)
申请公布日期
1939.02.10
申请号
ATD155521
申请日期
1936.08.07
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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