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发明名称
Elektronenröhre für Verstärkung mittels sekundärer Elektronenausstrahlung
摘要
申请公布号
AT183835(B)
申请公布日期
1955.11.25
申请号
ATD183835
申请日期
1953.12.24
申请人
ELECTRIC & MUSICAL INDUSTRIES LTD.
发明人
分类号
主分类号
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