Ключевые слова: arc, assembly, circle, construction, craft, craftsman, engineering, equipment, fabrication, factory, grinding, heavy, industrial, industry, iron, ironwork, join, labor, laborer, machine, making, man, manual, manufacture, manufacturing, mask, material, mechanical, metal, metalwork, metalworking, part, pipe, production, protection, protective, repair, repairing, safety, seam, spare, spark, steel, tool, welder, welding, work, worker, workplace, workshop,