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Triangle is a frequently used facility at school.Its sharp corner can be used to draw angles but it's sometimes harmful to kids.This new triangle-anqulometer suit is designed to protect school-kids from being hurt when using triangle.The sharp corner is hidden inside and only round corner left on profile,Thus make the triangle harmless to little kids.And also,put triangle in triangle to make full use of the space.
Zurui Jiang Chengcheng Zhang Wei Xue Si Chen