Ключевые слова: circular, construction, contractor, craftsman, cut, cutting, danger, dangerous, disc, electric, engineer, engineering, equipment, factory, fire, grinder, hot, industrial, industry, iron, job, labor, light, machine, man, manual, manufacture, manufacturing, metal, occupation, pipe, power, production, professional, protection, safety, spark, sparkle, speed, steel, technical, technology, tool, tools, welding, work, worker, working, workshop,