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发明名称
Electronic discharge tube with a plurality of plate-grid systems
摘要
申请公布号
US2589397(A)
申请公布日期
1952.03.18
申请号
US19490119282
申请日期
1949.10.03
申请人
KOEHLER LOUIS W
发明人
KOEHLER LOUIS W.
分类号
H01J21/14
主分类号
H01J21/14
代理机构
代理人
主权项
地址
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