Ключевые слова: abstract, background, business, circle, clock, cog, cogwheel, communication, concept, connection, construction, cooperation, design, element, engine, engineering, equipment, factory, gear, gears, graphic, icon, idea, illustration, industrial, industry, internet, machine, machinery, mechanic, mechanical, mechanism, metal, motion, power, progress, round, sign, spin, symbol, team, teamwork, technical, technology, transmission, web, wheel, work,