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发明名称
TEACHING APPARATUS
摘要
申请公布号
GB9214845(D0)
申请公布日期
1992.08.26
申请号
GB19920014845
申请日期
1992.07.13
申请人
INOVA ENTERPRISES LIMITED
发明人
分类号
G09B23/18
主分类号
G09B23/18
代理机构
代理人
主权项
地址
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