Ключевые слова: architects, architecture, ballast, catenary, construction, danger, electricity, engineering, equipment, excavator, fences, grounded, if you, indicators, industrial, industry, low, machine, machines, metal, modernization, negative, on track, poles, power, rails, railway, remodeling, repair, roads, section, security, sign, sleepers, station, stop sign, structure, technology, track section, train, transport, transportation, urban, wires, work,