Ключевые слова: abstract, bevel, blue, closeup, cog, cogwheel, component, computer, concept, conical, connection, design, detail, engine, engineering, equipment, gear, gearbox, gearing, glass, hardware, heavy, hub, industrial, industry, iron, machine, machinery, machining, manufacturing, mechanical, mechanics, mechanism, metal, modern, office, part, power, protection, repair, replacement, service, shaft, spare, spiral, steel, technical, technology, teeth, wheel,