Ключевые слова: 3d, abstract, backgrounds, business, circle, cog, cogwheel, concept, conceptual, connect, construction, cooperation, element, engine, engineering, equipment, gear, gearwheels, group, icon, illustration, industrial, industry, isolated, machine, machinery, mechanical, mechanics, mechanism, metal, metallic, part, power, professional, round, set, setting, steel, strength, structure, symbol, team, teamwork, technical, technology, template, tool, wheel, work,