Ключевые слова: background, black, black and white, building, building industry, clear sky, closeup, construction, construction site, curve, energy, engineering, equipment, factory, gas, gland, industrial, industry, infrastructure, iron, material, metal, outdoors, pipe, pipeline, pipes, plant, plumbing, production, safety, security, service, sky, steel, storage, supply, tap, technology, tube, tubes, water supply, white,