Ключевые слова: arc, background, circle, construction, cut, electric, engineering, equipment, factory, fire, flame, flash, grinder, hand, hot, industrial, industry, iron, job, labor, light, machine, man, manual, manufacture, manufacturing, mask, mechanic, metal, power, production, protection, red, repair, safety, smoke, spark, speed, steel, technical, technology, tool, treatment, turning, weld, welder, welding, work, worker, workshop,