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发明名称
摘要
申请公布号
JPS5610769(B2)
申请公布日期
1981.03.10
申请号
JP19720115001
申请日期
1972.11.15
申请人
发明人
分类号
C04B35/40;H01F1/34
主分类号
C04B35/40
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代理人
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地址
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