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发明名称
Perfectionnements aux tubes à décharge pour détection, amplification et génération d'oscillations électriques
摘要
申请公布号
FR695943(A)
申请公布日期
1930.12.23
申请号
FRD695943
申请日期
1930.05.22
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
分类号
H01J19/42
主分类号
H01J19/42
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代理人
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