Ключевые слова: business, circle, circular, construction, cut, electric, engineering, equipment, factory, fire, flame, flash, gas, grinder, hot, industrial, industry, iron, job, labor, light, machine, manufacturing, metal, metalwork, occupation, pipe, production, protection, repair, round, safety, skill, smoke, spark, steel, technical, technology, tool, weld, welder, welding, wheel, work, worker, workshop,