Ключевые слова: arena, asia, china, clean, closeup, competition, curve, digital, facilities, fast, field, floors, health, healthy, line, material, numbers, numerals, orbit, outdoor, paint, plastic, plastic runways, plastics, playground, professional, racetrack, red, rubber, rules, runway, runways, scenes, speed, sport, sports, sports field, sports fields, sports ground, sprint, stadium, standard runway, surface, symbol, track and field, training, venues,