Ключевые слова: city, construction, cover, curb, dirty, drain, drainage, engineering, environment, frozen, granite chips, grate, grid, grill, ground, gutter, hole, ice, icecrusted ground, industrial, industry, iron, manhole, metal, no people, nobody, outdoor, pavement, paving, pedestrian, road, sewage, sewage system, sewer, sidewalk, sink, steel, stone, storm, storm water, street, surface, texture, urban, wayside, winter,