Ключевые слова: architecture, building, carpentry, construction, contractor, engineering, equipment, hard, has, height, heights, helmet, industry, job, laboratory, laborer, manual, measures, observation, outdoor, outdoors, profession, professional, safety, scaffold, scaffolding, silhouette, site, skilled, sky, skyline, structural, structure, sun, sunlight, teamwork, tools, urban, work, worker, workers, worksite,