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发明名称
PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH UNDER-LAYER
摘要
申请公布号
KR1019900006482(B1)
申请公布日期
1990.09.01
申请号
KR1019850002227
申请日期
1985.04.03
申请人
发明人
分类号
主分类号
代理机构
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