Ключевые слова: abstract, arrangement, background, building, chemical, clean, concept, connection, construction, design, display, energy, engineering, equipment, facilities, factory, gas, grid, home, house, indoor, industrial, industry, maintenance, manufacturing, metal, object, oil, old, outside, pattern, pipe, pipeline, pipes, piping, plumbing, power, pump, refinery, safety, service, supply, system, tap, tube, urbane, valve, wall, water, white,