Ключевые слова: architect, blueprint, business, checking, construct, construction, construction site, contractor, document, employee, employment, engineer, engineer railway, factory, foreman, hardhat, helmet, industrial, industry, inspect, inspection, iron, job, machine, maintenance, male, manager, mechanical, occupation, professional, project, rail, rail train, railroad, railway, repair, safety, site, supervisor, technician, technology, track, train, transport, transportation, warehouse, work, worker railway, workers, workman,