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发明名称
OPTICAL DISK
摘要
申请公布号
JPH05144181(A)
申请公布日期
1993.06.11
申请号
JP19910283841
申请日期
1991.10.04
申请人
RICOH CO LTD
发明人
SEGAWA HIDEKI
分类号
G11B7/00;G11B7/0045;G11B7/013;G11B20/12;G11B27/10
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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