Ключевые слова: active, bicycle, big, breakage, chain, circumferential, closeup, construction, cranked, cycling, denticle, drive, engineering, foot, frame, gap, gear, lever, metal, movement, muscular, not exploited, overgrown, pedal, repair, rotates, rotation, simple, spider, sucks, tension, time, tool, tools, top, unused, walk, web, wheel,