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发明名称
Frequency converter
摘要
申请公布号
GB725795(A)
申请公布日期
1955.03.09
申请号
GB19530000269
申请日期
1953.01.05
申请人
EDOARDO RAVA
发明人
分类号
H02K47/20
主分类号
H02K47/20
代理机构
代理人
主权项
地址
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