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发明名称
Converter
摘要
申请公布号
US1979422(A)
申请公布日期
1934.11.06
申请号
US19320632703
申请日期
1932.09.12
申请人
RADIO CORPORATION OF AMERICA
发明人
THOLSTRUP HENRY
分类号
H02M7/533
主分类号
H02M7/533
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代理人
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