Ключевые слова: abstract, backdrop, background, business, circle, clipart, clock, cog, cogwheel, component, concept, construction, design, element, engine, engineering, enterprise, factory, gear, graphic, grunge, industrial, industry, isolated, machine, machinery, mechanical, mechanics, mechanism, metal, modern, objects, roll, rotate, rotation, round, set, spin, steel, symbol, technical, technology, teeth, torn, transmission, turn, wheel, work,