Ключевые слова: building, change sewer pipes, communication, concrete, construction, construction site, dig, digging road, drain, drainage, drainage pipe, drainage system, earthwork, engineering, equipment, excavation, ground, grunge, hole, industrial, industry, installation, installing, laying, manhole, pipe, pipeline, pipes, pit, plumbing, reinforced construction, repair, repair work, replacement, road, sanitary sewer, sewage, sewer, sewer construction, sewer pipes, sewer wells, sewerage, soil, system, trench, tube, underground, utility infrastructure, work,