Ключевые слова: abstract, background, business, christmas, circle, construction, craft, craftsman, cut, cutting, danger, dangerous, disc, disk, electric, energy, engineering, equipment, factory, fire, flame, flash, grinder, hand, heat, industrial, industry, iron, light, line, machine, manual, manufacture, manufacturing, metal, part, person, power, production, protection, safety, spark, steel, technical, technology, tool, welding, wheel, work, worker,