Ключевые слова: black, cargo, construction, construction machinery, electric train, electricity, employee, engineer, ethnicity, fixer, foremaster, hardhat, helmet, industrial, industry, inspect, inspector, maintenance, maintenance engineer, manager, pc, people, personnel, rail, railroad, railroad track, railroader, rails, railway, railwayman, repairman, road, service, serviceman, specialist, staff, technician, technology, toiler, track, train vehicle, trains, transport, transportation, transportation occupation, wagons, work, worker, workman, workpeople,