Ключевые слова: abstract, backdrop, background, black, business, classic, closeup, cogs, cogwheel, concept, conceptual, connect, cooperation, design, engine, engineering, factory, gear, gearbox, gears, grey, industrial, industry, interlock, machine, macro, mechanical, mechanics, mechanism, metal, motion, parts, precision, steel, success, team, teamwork, teeth, wheel, wheels, work,