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发明名称
Block-instrument for teaching hangle
摘要
申请公布号
KR200469803(Y1)
申请公布日期
2013.11.13
申请号
KR20110010644U
申请日期
2011.11.30
申请人
发明人
分类号
G09B1/08;G09B1/16
主分类号
G09B1/08
代理机构
代理人
主权项
地址
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