Nkeọkpọkọ squareihe bụ n'ozuzu carbon ígwè square ọkpọkọ na ala alloy square anwụrụ ihe onwunwe. Ọtụtụ square ọkpọkọ na-mere nke ígwè tubes, nke na-etolite gburugburu ọkpọkọ site unpacking, flattening, crimping na ịgbado ọkụ usoro, gburugburu ọkpọkọ akpọrepu n'ime square ọkpọkọ, wee bee n'ime chọrọ ogologo, square ọkpọkọ na-ekewa n'ime ji achọ square ọkpọkọ, n'ibu square. ọkpọkọ na architectural square ọkpọkọ, square ọkpọkọ na-eji na-ewu, ígwè n'ichepụta, ígwè Ọdịdị na ndị ọzọ engineering eji, arụmọrụ nke dị iche iche gburugburu ebe obibi ojiji nke square ọkpọkọ ga-adị iche, Lezienụ anya na iche iche mgbe ịzụrụ.