Ключевые слова: abstract, black, business, clock, closeup, concepts, construction, contemporary, element, engine, engineering, equipment, gear, gearwheels, gold, harmony, idea, industrial, industry, isolated, machine, macro, mechanic, metal, motion, one, part, power, reflect, reflection, sign, silhouette, single, steel, symbol, teamwork, technology, time, turning, wheel, white,