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A knife, a protractor, a ruler, and a compass, if these four tools can be synthesized and satisfy the above four functions at the same time, it will bring great convenience to both our study and life .The true qualities of ruler possesses the four functions above, and no matter when you are drawing lines ,angle measuring, circles or cutting papers, it can help you finish your work.
Chinese Changchun Jilin Animation Institute
Jilin Animation Institute