Ключевые слова: abstract, architecture, backdrop, background, blue, building, cement, concrete, construction, control, dirty, drain, drainage, energy, engineering, equipment, factory, grunge, home, house, industrial, industries, industry, interior, lead, line, material, object, old, pattern, pipe, pipeline, piping, plastic, plumbing, power, sewer, shadow, space, steel, system, technology, texture, tube, urban, valve, wall, water, white, work,