Ключевые слова: abstract, aluminum, background, build, checker, construct, construction, corrugated, covering, danger, dirty, durable, fall, filthy, floor, grate, gray, grey, industrial, industry, iron, ironworks, manufactured, material, metal, metallic, non, nonslip, paint, pattern, plate, repair, rough, rust, rusty, silver, slip, stairs, steel, step, sticker, strong, students, surface, texture, urban, utilitarian, walk, warning, watch,