Ключевые слова: arc, black, construction, craftsman, dangerous, discoloration, electric, electricity, engineering, equipment, fabricate, fabricator, fix, flash, gas, gloves, helmet, industrial, industry, job, labor, laborer, maintenance, man, manufacturing, mask, metal, occupation, oil, person, pipe, pipeline, plumber, production, protection, protective, repair, safety, skill, skilled, steel, tool, trade, trained, weld, welder, welding, work, worker,