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发明名称
Improvements in and relating to low frequency amplifiers
摘要
申请公布号
GB354192(A)
申请公布日期
1931.08.04
申请号
GB19300013438
申请日期
1930.05.01
申请人
LOUIS CADENEL
发明人
分类号
H03F1/16;H03F3/32
主分类号
H03F1/16
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代理人
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