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发明名称
Teaching system
摘要
申请公布号
GB2151064(A)
申请公布日期
1985.07.10
申请号
GB19830032610
申请日期
1983.12.07
申请人
FRANK * ROMANOVSKY
发明人
FRANK * ROMANOVSKY
分类号
G09B5/06;(IPC1-7):G09B7/06
主分类号
G09B5/06
代理机构
代理人
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地址
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