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发明名称
摘要
申请公布号
JPS5550100(B2)
申请公布日期
1980.12.16
申请号
JP19770020234
申请日期
1977.02.28
申请人
发明人
分类号
C22C19/07;C22C19/05;H01F1/053;H01F1/08
主分类号
C22C19/07
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