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发明名称
Improvements in and relating to electron discharge devices
摘要
申请公布号
GB471501(A)
申请公布日期
1937.09.02
申请号
GB19350033394
申请日期
1935.12.02
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J29/52
主分类号
H01J29/52
代理机构
代理人
主权项
地址
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