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经营范围
发明名称
EDUCATIONAL TEACHING AID
摘要
申请公布号
GB9017734(D0)
申请公布日期
1990.09.26
申请号
GB19900017734
申请日期
1990.08.13
申请人
KYRLE, MARTIN J
发明人
分类号
G09B17/02
主分类号
G09B17/02
代理机构
代理人
主权项
地址
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