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发明名称
An improved amplifier station for deep-sea signalling cables
摘要
申请公布号
GB352369(A)
申请公布日期
1931.07.09
申请号
GB19300036425
申请日期
1930.12.03
申请人
FELTEN & GUILLEAUME CARLSWERK ACTIENGESELLSCHAFT
发明人
分类号
H04B3/36
主分类号
H04B3/36
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