Ключевые слова: arc, background, construction, craftsman, energy, engineering, equipment, erection, factory, fire, fix, flame, flash, gas, heat, helmet, hood, industrial, industry, iron, job, light, manual, manufacture, manufacturing, mask, metal, pipe, pipeline, power, production, protection, protective, repair, safety, skill, smoke, spark, steel, supply, technical, technology, tool, tube, weld, welded, welder, welding, work, worker,