Ключевые слова: arc, argonarc, closeup, construction, education, engineering, equipment, flash, hammer, helmet, helping, hot, industrial, industry, job, light, male, man, manual, manufacture, manufacturing, mask, men, metal, metalwork, occupation, protection, protective, repair, safety, school, skill, smoke, soccer, soccer goal, spark, steel, students, technical students, technology, thai, thailand, tool, weld, welder, welding, work, worker, working, workshop,