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发明名称
Electron discharge devices
摘要
申请公布号
GB510842(A)
申请公布日期
1939.08.09
申请号
GB19380033945
申请日期
1938.11.22
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H01J19/34
主分类号
H01J19/34
代理机构
代理人
主权项
地址
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