Ключевые слова: block, building, cement, cesspit, chamber, circle, circular, concrete, construction, culvert, department, ditch, drain, drainage, engineering, equipment, factory, ferroconcrete, gray, grey, industrial, industry, manhole, manufacturing, material, object, pipe, pit, plant, plate, plumbing, produce, production, ring, round, sanitary, section, septic, sewage, sewer, site, stack, strong, sump, tube, tunnel, warehouse,