Ключевые слова: belts, blue, concrete, construction, copper, danger, development, elevators, engineering, equipment, factory, frame, gold, goldmine, heavy, high, industrial, industry, machinery, manufacturing, metal, mine, minerals, ore, pile, plants, precious, processing, red backgrounds, refinery, remote working, site, sky, steel, structure, sunrays, sunset sky, tall, tanks, technology, tower, work,