Ключевые слова: african, arc, construction, craftsman, crude, electric, energy, engineering, equipment, factory, fire, flash, fuel, gas, gloves, helmet, industrial, industry, iron, job, join, labor, laborer, maintenance, male, man, manufacture, manufacturing, mask, metal, occupation, oil, pipe, pipeline, piping, plumbing, production, protection, protective, refinery, repair, safety, skill, steel, supply, tool, water, weld, welder, welding, work, worker, workers, workplace, workshop,