Ключевые слова: abstract, agricultural, agriculture, auto, automobile, automotive, background, ballbearing, belt, bevel, chain, chain detail on machinery, chrome, circle, clean, clockwork, close, close up, cog, cogwheel, complexity, concept, conceptual, connect, connection, detail, engine, engineering, equipment, gear, industrial, industry, machine, machinery, mechanical, mechanism, metal, motor, object, part, power, steel, technical, technology, tool, torque, transfer, transmission, transportation,