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shuang la huan yi la guan deng
Pages: 73
Year: Issue:  2
Journal: The Second Class of Guangdong

Abstract: 扬州维扬试验小学五年级学生李沐,获得第一项国家专利的时候才7岁.他的灵感来自于一次被拉断了的易拉罐拉环划破了手指的小意外.李沐便想,怎样的易拉罐拉环既方便儿童开启,又不易受伤呢?……
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