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发明名称
Устройство для регулировки селективности банд-фильтра помощью катодных ламп, служащих для изменения затухания и связи между контурами
摘要
申请公布号
SU53368(A1)
申请公布日期
1937.11.30
申请号
SUD53368
申请日期
1937.06.13
申请人
SERAPIN G.K.
发明人
SERAPIN G.K.
分类号
H03H11/20;H03J1/06
主分类号
H03H11/20
代理机构
代理人
主权项
地址
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