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发明名称
摘要
申请公布号
DD112027(A1)
申请公布日期
1975.03.12
申请号
DD19740179122
申请日期
1974.06.13
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发明人
分类号
(IPC1-7):H01F31/06
主分类号
(IPC1-7):H01F31/06
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