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发明名称
ELECTRIC DISCHARGE TUBE
摘要
申请公布号
CA328504(A)
申请公布日期
1932.12.13
申请号
CAD328504
申请日期
申请人
THE RADIO CORPORATION OF AMERICA
发明人
KAREL MARINUS VAN GESSEL
分类号
主分类号
代理机构
代理人
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