Ключевые слова: builder, business, checking, construction, contractor, control, employee, employment, engineer, engineering, equipment, factory, foreman, hardhat, helmet, industrial, industry, inspector, job, machine, maintenance, man, manufacturing, material, mechanic, metal, occupation, portrait, professional, rail, railroad, railway, repair, safety, service, site, station, steel, switch, teamwork, technician, technology, track, train, transport, transportation, warehouse, work, worker, workshop,