Ключевые слова: background, black, bunch, business, chemical, construction, cylinder, district, engineering, environment, equipment, factory, gas, group, heap, heat, heater, heavy, industrial, industry, insulation, iron, isolation, lying, manufacturing, medium, metal, oil, pipe, pipeline, pipes, plastic, pressure, pvc, repair, round, rust, shell, site, stack, stainless, steel, technology, thermoelectric, track, tube, tubes, tubing, water, wrapper,