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经营范围
发明名称
Portable Vocabulary Acquisition Device
摘要
申请公布号
KR101127621(B1)
申请公布日期
2012.03.22
申请号
KR20090126011
申请日期
2009.12.17
申请人
发明人
分类号
G09B19/06;G09B7/02
主分类号
G09B19/06
代理机构
代理人
主权项
地址
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