Ключевые слова: balance, black, circle, communication, concept, degrees, design, distance, east, element, engineering, equipment, exercise, flat, graphic, grey, health, icon, illustration, instrument, isolated, kilogram, location, map, measure, measurement, measuring, navigation, north, pin, point, power, protractor, ruler, scale, set, sign, south, symbol, technology, ton, tool, transparent, weight, wind,