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发明名称
Optical system
摘要
申请公布号
EP0405444(B1)
申请公布日期
1997.09.03
申请号
EP19900112127
申请日期
1990.06.26
申请人
NEC CORPORATION
发明人
KIMURA, YASUO;ONO, YUZO
分类号
G11B7/09;G11B7/135;G11B11/105;(IPC1-7):G11B7/09;G11B11/10
主分类号
G11B7/09
代理机构
代理人
主权项
地址
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