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, job, machine, maintenance, male, manager, mechanical, occupation, professional, project, rail, railroad, railway, repair, safety, shadow, silhouette, site, supervisor, technician, technology, track, train, transport, transportation, warehouse, work, worker, workers, workman,