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经营范围
发明名称
Improvements in frequency selective amplifiers
摘要
申请公布号
GB820717(A)
申请公布日期
1959.09.23
申请号
GB19570000844
申请日期
1957.01.09
申请人
ADMIRAL CORPORATION
发明人
分类号
H03H7/01
主分类号
H03H7/01
代理机构
代理人
主权项
地址
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