Ключевые слова: building, cement, concrete, concrete drainage, concrete rings, construction, construction site, culvert, development, ditch, drain, drainage, engineering, equipment, ground, industrial, industry, infrastructure, large, material, pile, piled, pipe, pipeline, pipes, pipes stacked, plumbing, repair, round, sewage, sewage pipes, sewer, sewer ring, sewerage, stack, stacked, storage, system, tube, underground, underground utility, urban sewerage, waste, water, work,