N S M P

[ Irons and steels; ] steel pipes and tubes [ ; angle irons; light gauge steels; channel irons; steel plates and sheets; crash barriers of metal for roads; guard barriers of metal; fences of metal; traffic and highway noise barriers of metal; steel roof decks; steel floor decks; barrier materials of metal for use in the construction of debris flow or sediment control structures; metal dam form works; corrugated steel pipes; scaffolding of metal; metal poles for electric power lines; metal poles for street lighting; metal earth retaining fences, barricades and walls; steel sheet piles ]