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发明名称
A puzzle block having the function of the English language studying
摘要
申请公布号
KR101120740(B1)
申请公布日期
2012.03.23
申请号
KR20090109054
申请日期
2009.11.12
申请人
发明人
分类号
G09B1/16;G09B1/34;G09B19/06
主分类号
G09B1/16
代理机构
代理人
主权项
地址
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