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发明名称
Teaching device
摘要
申请公布号
GB0029479(D0)
申请公布日期
2001.01.17
申请号
GB20000029479
申请日期
2000.12.02
申请人
NETTLEFORD, BARRY
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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