Ключевые слова: arc, assembly, build, business, construction, craftsman, engineering, equipment, erecting, fabricate, factory, fire, flash, industrial, industry, iron, job, labor, laborer, light, machine, man, manufacture, manufacturing, mask, men, metal, production, protection, protective, repair, safety, shipyard, skill, smoke, spark, steel, structure, technical, technology, tool, under, under construction, welded, welder, welders, welding, work, worker, workplace,