Ключевые слова: 3d, abstract, background, binding, bonding, circle, classic, clock, clockwork, cog, cogwheel, concept, connection, cooperation, crosssection, design, engine, engineering, equipment, gear, gearbox, gold, hardware, industrial, industry, machine, machinery, macro, mechanical, mechanics, mechanism, metal, metallic, old, part, power, progress, reliability, retro, rotation, shape, steel, teamwork, technology, turn, turning, unity, watch, wheel, work,