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发明名称
Multistage vacuum tube amplifier
摘要
申请公布号
US2198317(A)
申请公布日期
1940.04.23
申请号
US19380210384
申请日期
1938.05.27
申请人
RADIO CORPORATION OF AMERICA
发明人
ROBERTS WALTER VAN B.
分类号
H01J21/20
主分类号
H01J21/20
代理机构
代理人
主权项
地址
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