Ключевые слова: accuracy, background, background texture, black, centimeter, centimetre, close up, closeup, construction, construction equipment, construction industry, dimension, drawing, education, engineer, equipment, extend, fold, geometry, industry, instrument, learning, length, line, long, magnification, mathematics, measure, measurement, measuring, metal, meter, metric, millimeter, mm, number, object, plastic, precise, rule, ruler, scale, school supplies, steel, straight, tape, tool, work, yellow, yellow ruler,