Ключевые слова: arc, assembly, background, construction, defense, engineering, equipment, fabrication, face, factory, fire, flame, framework, gas, helmet, industrial, industry, iron, job, joint, labor, light, machine, male, man, manual, manufacturing, mask, metal, metallic, natural, protection, protective, rolled, safety, seam, security, shell, shield, skilled, spark, steel, structure, tool, weld, welder, welding, work, worker,