Makina opangira ma chubu a Bimetallic extruded finned amagwiritsidwa ntchito kupanga chubu chokhala ndi zipsepse zokhala ndi chomangira chabwino kwambiri cha fin-to-chubu chopatsa mphamvu komanso moyo wautali.Kaya ndi ntchito yovuta, kutentha kwambiri, kapena malo owononga, chubu cha extruded fin chubu ndiye njira yabwino kwambiri yosinthira kutentha.