Ключевые слова: aerial, air, aircraft, altitude, below, blue, blue skies, bright, building, building activity, city, clear sky, construction equipment, construction industry, construction machinery, construction site, contrary, contrast, copy space, crane, crane machinery, day, engineering, flying, heavy, high up, industry, laboratory, lift, lines, machinery, metal, no people, outdoors, perspective, site, sky, steel, sun, sunny, tall high, tower, transportation, travel, urban, vapor trail, white color, work, working,