Ключевые слова: background, bonding, circle, closeup, cog, cogwheel, component, conceptual, connect, detail, disassembled, element, equipment, gear, gears, gold, group, hardware, hardwood, heavy, industrial, industry, interlocked, interlocking, linked, machine, machinery, mechanical, mechanics, mechanism, metal, metallic, motion, old, part, power, rotate, solid, spin, steel, teamwork, technology, teeth, time, together, transmission, turn, wheel, white, worn,