Ключевые слова: ancient, antique, brown, business, circle, classic, cog, cogwheel, concept, connection, cooperation, design, detail, engine, engineering, equipment, factory, gear, gearbox, industrial, industry, interlocked, iron, lose up, machine, machinery, macro, mechanical, mechanics, mechanism, metal, motion, old, part, power, precision, rust, rusty, spin, steel, symbol, teamwork, technical, technology, teeth, transmission, turn, vintage, wheel, work,