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创意直尺 / ruler creative

创意直尺
创意直尺

Add the convex lens that can move freely in ruler, in order to let the numbers looks bigger and recognize easily. It can avoid children to have the incorrect posture when the use ruler and protect their eyes and cervical spine. This design also can help the elder to use ruler.

University

zhengzhou University of light

zhengzhou University of light
zhengzhou, China

YULI LEI,
zhengzhou University of light