Ключевые слова: arc, black, blue, color, construction, engineering, equipment, erection, fabrication, factory, fire, flame, flash, hot, industrial, industry, job, labor, laborer, labourer, light, machine, man, manufacture, manufacturing, mask, metal, power, protection, protective, repair, safety, sheet, skill, skilled, smoke, spark, steel, structure, technology, tool, weld, welded, welder, welders, welding, work, worker, workplace, workshop,