Ключевые слова: aerial, ballast, builder, building, business, construct, construction, contractor, crossing, cutting, employment, engineering, equipment, fix, fixing, grunge, industrial, industry, installation, line, maintenance, mechanic, mechanical, men at work, metal, protection, protective, rail, rail tracks, railroad, railroad rail, railway, railway station, railway workers, repair, repair railway rails, repairing, repairing train, safety, site, track, track repair, track workers, train, transport, transportation, work, workers, workers repairing,