Ключевые слова: abstract, background, building, business, ceiling, chemical, clean, construction, design, drainage, energy, engineering, equipment, factory, fuel, gas, hanging, industrial, industry, insulation, interior, line, manufacturing, metal, object, oil, pattern, pipe, pipeline, pipes, piping, plastic, plumbing, power, refinery, safety, system, texture, top, tube, valve, wall, water, white, work,