Ключевые слова: abstract, ancient, antique, background, business, circle, clock, closeup, cog, cogs, cogwheel, concept, construction, design, detail, engine, engineering, equipment, flow, gear, grunge, industrial, industry, inside, interior, iron, machine, machinery, macro, mechanical, mechanism, metal, motion, old, part, power, precision, retro, round, rusty, science, steel, technical, technology, turn, vintage, watch, wheel, work,