Ключевые слова: background, build, cement, circle, concrete, construction, culvert, cut, development, ditch, drain, drainage, duct, gray, ground, hole, housing, identical, industrial, industry, irrigation, materials, overlap, pile, pipe, plumbing, public, put, pvc, repair, replace, ring, round, scatter, scattered, scatteredly, sewage, sewer, site, soil, stack, stacked, stock, storage, tube, underground, warehouse, waste, water, yard,