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发明名称
Improvements in or relating to electron discharge devices
摘要
申请公布号
GB494814(A)
申请公布日期
1938.11.01
申请号
GB19380006461
申请日期
1938.03.01
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY, LIMITED
发明人
分类号
H01J25/00;H01J25/72
主分类号
H01J25/00
代理机构
代理人
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