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发明名称
Language learning apparatus
摘要
申请公布号
GB2248961(A)
申请公布日期
1992.04.22
申请号
GB19900022352
申请日期
1990.10.15
申请人
TERENCE PHILIP * HEMMINGS
发明人
TERENCE PHILIP * HEMMINGS
分类号
G09B19/08
主分类号
G09B19/08
代理机构
代理人
主权项
地址
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