Ключевые слова: abstract, background, black, car, circle, closeup, cog, concept, connection, construction, cooperation, design, detail, engine, engineering, equipment, factory, gear, gear wheel, gears, gears and cogs, gerhard pettersson, idea, industrial, industry, machine, machinery, mechanic, mechanical, mechanism, metal, metallic, motor, object, old, part, pattern, power, steel, table, teamwork, technology, teeth, texture, tool, tools, wheel, wooden, work,