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发明名称
Elektronenröhre mit Kathode und mindestens fünf weiteren Elektroden.
摘要
申请公布号
AT151755(B)
申请公布日期
1937.12.10
申请号
ATD151755
申请日期
1933.12.22
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
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