Ключевые слова: abstract, accuracy, action, background, business, cog, cogwheel, communication, concept, connection, consent, construction, cooperation, design, dirty, dust, engine, engineering, equipment, gear, industry, intelligence, interaction, interlocked, invention, iron, machine, machinery, metal, metallic, motion, object, old, organization, power, progress, shape, sign, steel, success, symbol, team, teamwork, technology, teeth, transmission, turning, unity, wheel,