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发明名称
摘要
申请公布号
JPH04502649(A)
申请公布日期
1992.05.14
申请号
JP19900510372
申请日期
1990.06.20
申请人
发明人
分类号
C22C45/02;H01F1/153;H01F3/00
主分类号
C22C45/02
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代理人
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地址
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