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发明名称
摘要
申请公布号
JPH0649578(B2)
申请公布日期
1994.06.29
申请号
JP19870145205
申请日期
1987.06.12
申请人
发明人
分类号
C01G49/00;H01F1/11;(IPC1-7):C01G49/00
主分类号
C01G49/00
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代理人
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