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The universal ruler can realize all directions of-rotation, translation, angle of-rotation, drawing circles and-curves of any radius, with clear

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2 Pieces Multifunctional Drawing Ruler, Plastic Multipurpose Draw Round Curve Horizontal Parallel Vertical Line Measuring Drafting Template Rulers for School Office Supplies : Office Products

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The universal ruler can realize all directions of-rotation, translation, angle of-rotation, drawing circles and-curves of any radius, with clear

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Multifunction Rotatable Drawing Ruler Students Mathematical Ellipse Tool Circle Drafting Stereo B9F7