hana ʻo ia oftheuea ihu is to make the mask fit the face better and ensure that bacteria are not easy to enter the respiratory tract. The uea ihu needs to have a good force-bearing shape, there will be no rebound under the condition of no force, and the existing shape will not be deformed.
Nui nā mea i hoʻohana ʻia no ka uea ihu: polyolefin polymer coated galvanizedfine steel wire, plastic, and pure aluminium.
Ka uea puka ihu haohana ʻia me ka polyolefin polymer kapa komo iā galvanized kila kila uea.
Puka ihu lika, nā mea āpau i hana i ka resin polyolefin.
Ka uea aluminiumnoseua hehi ʻia mai ka metalsheet metal