Ki te maha nui o te hoahoa hua ārai me te hangarau hangarau, whakangao ngaio whakangao me te taputapu whakamatautau o te muka kowiriwiri, taupoki, paninga, paninga papanga raranga raranga me etahi atu. muka hiriwa, muka kowiri kowiri, FeCrAl, aramid, tinine coper, karaihe muka me etahi atu Me te roopu o nga kaimahi whakahaere whakangao tino kounga kairangi me te puri hangarau hanga tuupono, ka whakarite maatau ko o taatau hangarau me o taatau hua e tino pai ana.