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发明名称
摘要
申请公布号
JPS5023650(B1)
申请公布日期
1975.08.09
申请号
JP19710051628
申请日期
1971.07.12
申请人
发明人
分类号
C22C19/03;C22C38/08;H01F1/00
主分类号
C22C19/03
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代理人
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