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经营范围
发明名称
Perfectionnements aux aimants permanents
摘要
申请公布号
FR725088(A)
申请公布日期
1932.05.07
申请号
FRD725088
申请日期
1931.10.26
申请人
FERRANTI LIMITED
发明人
分类号
H01F7/02
主分类号
H01F7/02
代理机构
代理人
主权项
地址
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