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发明名称
PROCESS FOR THE PRODUCTION OF FINE-GRAINED AND HEAT-RESISTING FERRIC OXIDE
摘要
申请公布号
KR1019900002547(B1)
申请公布日期
1990.04.20
申请号
KR1019870015489
申请日期
1987.12.31
申请人
发明人
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主分类号
代理机构
代理人
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