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经营范围
发明名称
Selective amplifiers employing electron discharge tubes
摘要
申请公布号
GB581419(A)
申请公布日期
1946.10.11
申请号
GB19440006580
申请日期
1944.04.07
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H04B1/16
主分类号
H04B1/16
代理机构
代理人
主权项
地址
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