Ключевые слова: abstract, asphalt, backgrounds, cement, circle, circular, close, concrete, construction, covers, details, dirty, drainage, drains, ground, holes, industry, iron, lid, life, macro, manhole, metal, new, object, old, pattern, pipes, plant, road, rough, rust, sanitary, scene, sewage, sewers, sidewalk, sign, squares, steel, streets, texture, treatment, underground, urban, utilities, water, words,