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发明名称
BOOK READER FOR THE IMPERFECTLY SIGHTED
摘要
申请公布号
GB9002549(D0)
申请公布日期
1990.04.04
申请号
GB19900002549
申请日期
1990.02.06
申请人
FOSTER, DAVID B
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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