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发明名称
METHOD FOR PRODUCTION OF MAGNETIC IRON OXIDE POWDER CONTAINING COBALT
摘要
申请公布号
KR1019890001971(B1)
申请公布日期
1989.06.05
申请号
KR1019830005798
申请日期
1983.12.07
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
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