Ключевые слова: architect, architecture, background, builder, building, business, city, construct, construction, dark, development, dusk, engineer, engineering, equipment, estate, foreman, hard, hat, heavy, helmet, high, industrial, industry, job, man, management, men at work, metal, night, orange, people, professional, project, safety, scaffolding, silhouette, site, sky, steel, structure, sunrise, sunset, supply, technology, work, worker, working, yellow,