Ключевые слова: arc, background, black, blue, building, civil, construction, electrode, energy, engineering, equipment, factory, flame, gas, heat, industrial, industry, iron, light, line, man, manufacture, manufacturing, mask, metal, oil, pipe, pipeline, pipes, piping, plant, power, pressure, protection, protective, safety, shield, sparks, stainless, steel, technology, tool, tube, weld, welder, welding, work, worker, workers, workshop,