Ключевые слова: accident, age, city, concrete, conduit, construction, corrosion, dilapidation, drain, drainage, duct, emergency, energy, engineering, equipment, excavation, grunge, heat, heavy, industry, land, leak, metal, municipal, network, new, old, pipeline, pipes, pits, plumbing, reconstruction, repair, replacement, round, rust, safety, sewage, sewerage, special, steel, structure hurray, supply, system, technology, trench, welder, welding works, worn,