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发明名称
摘要
申请公布号
JPH0542069(B2)
申请公布日期
1993.06.25
申请号
JP19850074232
申请日期
1985.04.10
申请人
HITACHI LTD
发明人
OKAMOTO HIROO
分类号
G11B20/10;G11B15/467;(IPC1-7):G11B20/10
主分类号
G11B20/10
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