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发明名称
Improvements in optical discs
摘要
申请公布号
GB9714887(D0)
申请公布日期
1997.09.17
申请号
GB19970014887
申请日期
1997.07.15
申请人
HARMONIC HALL OPTICAL DISC LTD
发明人
分类号
G11B7/26;G11B23/40
主分类号
G11B7/26
代理机构
代理人
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地址
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