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发明名称
FERROMAGNETIC IRON OXIDE CONTAINING COBALT
摘要
申请公布号
KR1019890001485(B1)
申请公布日期
1989.05.04
申请号
KR1019820003349
申请日期
1982.07.27
申请人
发明人
分类号
主分类号
代理机构
代理人
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