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发明名称
Electron tube
摘要
申请公布号
US2534508(A)
申请公布日期
1950.12.19
申请号
US19460650957
申请日期
1946.02.28
申请人
RADIO CORPORATION OF AMERICA
发明人
FERRIS WARREN R.
分类号
H01J21/14;H03D3/32
主分类号
H01J21/14
代理机构
代理人
主权项
地址
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