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发明名称
Perfectionnements aux modes de montage comportant l'emploi de lampes à grille-écran, à pente variable pour le réglage de l'amplification
摘要
申请公布号
FR746220(A)
申请公布日期
1933.05.24
申请号
FRD746220
申请日期
1932.11.23
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
分类号
H03G3/22
主分类号
H03G3/22
代理机构
代理人
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