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Straight Angle Ruler give users a new way to draw angle. With this design, users can draw seven different angles by only one ruler. Straight angle ruler can be bent to different angles with an elastic inside. Using Straight Angle Ruler, by contrast, can draw a more precise angle.
Beihang University
Beijing, China
Yinshuai Zhang,
Tsinghua University
Shuai Chang,
Tsinghua University
Nanjin Chen,
Tsinghua University
Hansi Zhao,
Beijing University of Technology