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发明名称
Electron discharge devices
摘要
申请公布号
GB437723(A)
申请公布日期
1935.11.04
申请号
GB19340003350
申请日期
1934.02.01
申请人
STANDARD TELEPHONES AND CABLES, LIMITED
发明人
分类号
H01J21/02
主分类号
H01J21/02
代理机构
代理人
主权项
地址
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