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发明名称
Improvements in or relating to electrodes for electron discharge devices
摘要
申请公布号
GB401568(A)
申请公布日期
1933.11.16
申请号
GB19330008772
申请日期
1933.03.23
申请人
IGRANIC ELECTRIC COMPANY LIMITED
发明人
分类号
H01J19/30
主分类号
H01J19/30
代理机构
代理人
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