Ключевые слова: arc, circular, confined, construction, cut, cutter, engineering, equipment, factory, fire, flame, gas, grinder, heat, hot, industrial, iron, job, labor, laser, light, machine, machinery, man, manufacture, mask, metal, metalwork, occupation, oil, pipe, plasma, power, precision, processing, production, protection, safety, sparks, steel, tank, technology, tool, welder, welding, worker, working, workplace, workshop,