Ключевые слова: background, binding, business, circle, clock, clockwork, closeup, cog, cogwheel, concept, conceptual, connection, engine, engineering, equipment, gear, horizontal, idea, industrial, industry, machine, machine part, machinery, macro, mechanical, mechanics, mechanism, metal, metallic, metaphor, minute, movement, no people, object, old, part, photography, power, red, round, steel, teamwork, technical, technology, time, toothed, transmission, watch, wheel,