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发明名称
摘要
申请公布号
NL7401507(A)
申请公布日期
1974.08.29
申请号
NL19740001507
申请日期
1974.02.04
申请人
发明人
分类号
H01F27/245;H01F27/26;H01F30/00;H01F37/00;H01F38/10;H01F41/02;(IPC1-7):H01F41/02
主分类号
H01F27/245
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代理人
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