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shou jie zhong guo qing shao nian chuang yi da sai zuo zhi shi chan quan xuan chuan jiao yu xi lie huo dong chuang yi zuo pin xuan deng
Pages: 76-79
Year: Issue:  8
Journal: China Invention & Patent

Abstract: <正>2007年7月20~24日,首届中国青少年创意大赛暨知识产权宣传教育系列活动在北京科技职业学院隆重举行。为期5
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