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发明名称
Improvements in or relating to electron discharge devices for visually indicating voltage
摘要
申请公布号
GB502968(A)
申请公布日期
1939.03.27
申请号
GB19370026121
申请日期
1937.09.27
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY LIMITED
发明人
分类号
H01J29/16;H01J31/14
主分类号
H01J29/16
代理机构
代理人
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