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发明名称
Anordnung von Kathoden zwecks Erzielung scharf gebündelter Elektronenstrahlen.
摘要
申请公布号
AT137258(B)
申请公布日期
1934.04.25
申请号
ATD137258
申请日期
1932.12.02
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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