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发明名称
FOCUS SERVO DEVICE IN AN OPTICAL PICKUP SYSTEM
摘要
申请公布号
GB2090437(B)
申请公布日期
1984.09.26
申请号
GB19810038973
申请日期
1981.12.24
申请人
UNIVERSAL PIONEER CORP
发明人
分类号
G02B7/28;G02B27/40;G11B7/09;(IPC1-7):G11B7/08;G05B11/06;G05D3/14
主分类号
G02B7/28
代理机构
代理人
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地址
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