Hoʻopuka ʻo Datang i ka Extruded Fin Tubes i hana ʻia e ke kaʻina extrusion rotary anuanu.Hoʻokumu ʻia ka Extruded Fin mai kahi paipu alumini waho me ka mānoanoa pā nui, i hoʻopaʻa ʻia ma luna o kahi paipu kumu i loko.Hoʻokuʻu ʻia nā paipu ʻelua ma loko o ʻekolu arbors me nā diska ʻōwili e ʻomi maoli a hoʻokuʻu paha i nā ʻili alumini i luna a i waho o ka mea muff i ke ʻano spiral i hoʻokahi hana.ʻO ke kaʻina hana o ka extrusion e paʻakikī i nā ʻili a pale i nā pilina metala like ʻole ma ke aʻa hope.ʻO ka ʻili waho i ʻike ʻia he alumini a ʻaʻohe mau minuke ma waena o nā ʻili pili kahi e komo ai ka wai.Mālama kēia i ka hana maikaʻi i manaʻo ʻia i ka wā e hoʻohana ai i kahi ili lōʻihi no ka hoʻoili wela.I loko o ke kaʻina hana finning ua hana ʻia kahi paʻa mīkini paʻa ma waena o ka pahu alumini i hoʻopaʻa ʻia i waho a me ka paipu kumu o loko o ka metala i makemake ʻia.