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经营范围
发明名称
Improvements in and relating to frequency changers
摘要
申请公布号
GB746822(A)
申请公布日期
1956.03.21
申请号
GB19500026390
申请日期
1950.10.30
申请人
ALEK GROSMAN
发明人
分类号
H01F38/04;H03B19/03
主分类号
H01F38/04
代理机构
代理人
主权项
地址
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