Ключевые слова: arc, background, chain, close, connect, connection, construction, craftsman, cut, detail, engineering, equipment, fabrication, factory, industrial, industry, insurance, iron, joint, light, line, manufacture, manufacturing, material, metal, metalwork, pattern, pipe, pipeline, positions, safety, scale, seam, security, sheets, skilled, solder, splice, stainless, steel, surface, technology, texture, weld, welded, welder, welding, work, worker,