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发明名称
LOW FREQUENCY AMPLIFIER
摘要
申请公布号
CA388241(A)
申请公布日期
1940.04.23
申请号
CAD388241
申请日期
申请人
N.V. PHILIPS GLOEILAMPENFABRIEKEN
发明人
HENRICUS ADRIANUS BROOS
分类号
主分类号
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代理人
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