The na-aga n'ihu extrusion teknuzu bụ a revolutionary na akara nke na-abụghị ferrous metal nhazi, ọ na-eji maka a dịgasị iche iche nke ọla kọpa, aluminum ma ọ bụ ọla kọpa alloy mkpanaka extrusion ka tumadi ime ka a dịgasị iche iche nke ewepụghị, gburugburu, ụgbọ ala mmanya, na profiled conductors, wdg.