Ключевые слова: abstract, accuracy, backdrop, background, bond, classic, closeup, cogs, cogwheel, concept, conceptual, connect, connection, cooperation, engine, engineering, equipment, factory, gearbox, gears, group, industrial, industry, interlock, large, machine, mechanical, mechanics, mechanism, metal, motion, motorcycle, objects, oil, precious, precision, reduction, rotate, shine, steel, success, technology, teeth, togetherness, toned, transmission, up, welding, wheel, work,