Ключевые слова: arc, background, blue, bright, burner, concept, construction, craftsman, craftsmanship, electric, engineering, equipment, flame, flash, gas, heat, hot, industrial, industry, iron, job, joint, labor, light, manufacture, manufacturing, metal, metalwork, occupation, pipe, professional, repair, safety, site, skill, smoke, spark, steel, structure, technical, technology, tool, torch, weld, welder, welding, work, worker, workplace, workshop,