Elementary Version For drawing regular simple figures and graphs, basic lines, circles, rectangles, and triangles , which are widely used for primary school students , elementary tools for designs, measuring tools , office supply, it works better with other 2 types of mulifunctional geometric drawing rulers
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Intermediate Version Beside drawing regular simple figures and graphs, basic lines, circles, rectangles, and triangles , also parabolas , 3d graphs for junior high school students, intermediate tools for designs, measuring tools , office supply, , it works better with other 2 types of mulifunctional geometric drawing rulers
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Advanced Version Beside drawing regular basic figures and graphs, also parabolas , 3d graphs for junior or senior high school students, advanced tools for designs, measuring tools , office supply, it works better with other 2 types of mulifunctional geometric drawing rulers
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