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TSLInventors Set of Mathematical Instrument Compass Box. World 1st elipce drawing compass.

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Xuất bản 09/08/2016
World 1st Mathematical Instrument Compass Box with compass can drawing elipse and circles both. Box includes 15cm Ruler, 45 and 60 degree set squares, 360° degree protractor ,sharpener, pencil, vernier caliper . Student Model now you can buy from www.tslinventors.com.