Ключевые слова: background, big, business, cog, cogwheel, concept, conceptual, connect, connection, construction, cooperation, engine, equipment, factory, fit, gear, gray, group, heavy, ideas, industrial, industry, isolated, large, light, machine, machinery, mechanical, metal, metallic, modern, old, one, part, power, reflection, set, shiny, silver, single, steel, system, teamwork, technology, teeth, tool, wheel, white, work,