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经营范围
发明名称
TEACHING DEVICE
摘要
申请公布号
GB8531583(D0)
申请公布日期
1986.02.05
申请号
GB19850031583
申请日期
1985.12.23
申请人
FRENMIST LTD
发明人
分类号
G09B11/08;G09B13/00;G09B19/06
主分类号
G09B11/08
代理机构
代理人
主权项
地址
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