Ключевые слова: ascent, challenge, cloudy, construction, covered, day, engineering, environment, equipment, factory, fog, foggy, force, gear, heavy, industrial, industry, infrastructure, labor, landscape, machinery, maintenance, manufacturing, metal, orange, outdoor, pipes, pollution, process, safety, silhouette, silhouettes, site, stairs, stairway, steel, structure, technology, transportation, urban, worker,