Ключевые слова: 12, background, business, centimeter, cm, combined, construction, design, drawing, education, equipment, exactly, flat, foot, geometric, geometry, horizontal, imperial, inch, instrument, length, line, long, measure, measurement, meter, metric, millimeter, modern, nobody, number, object, office, paint, plastic, print, row, ruler, scale, school, size, square, standard, straight, supply, symbol, tool, units, white, width,