Irin square: ni ri to, bar iṣura.Iyatọ lati square tube, ṣofo, eyi ti o jẹ paipu.Irin (Irin): jẹ ohun elo ti a ṣe ti awọn ingots, awọn billet tabi irin nipasẹ sisẹ titẹ si ọpọlọpọ awọn nitobi, titobi ati awọn ohun-ini ti a beere.Awo irin alabọde, irin awo tinrin, dì ohun alumọni itanna, irin rinhoho, irin pipe irin, irin paipu welded, awọn ọja irin ati awọn oriṣiriṣi miiran.