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发明名称
Improvements in electric discharge tubes, having a secondary-emission electrode
摘要
申请公布号
GB626710(A)
申请公布日期
1949.07.20
申请号
GB19460021889
申请日期
1946.07.23
申请人
PHILLIPS LAMPS LIMITED
发明人
分类号
H01J43/02
主分类号
H01J43/02
代理机构
代理人
主权项
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