Alumina (Al2O3) fa'aoga autu
Vaega o mea faigaluega e gaosia ai le semiconductor (vaega o le lua, fa'a'ese'ese fa'a'ese'ese, vaega o meafaigaluega e togitogiina, pipi'i;Vaega ole fale (fa'avasegaina, vili ea, vili vili);Vaega fa'apisinisi lautele (fa'aisa masini fa'apipi'i fa'asolo, fa'a'au fa'asolo, fa'amomoli);maualuga sa'o, sa'o, vevela mea faigaluega fa'ameamea (fa'atulagaina tulaga, fa'apipi'i fa'apotopotoga);La'ei vaega e tete'e (ta'iala ta'i masini tusi uaea, ala uaea u'amea, alavai ta'iala);Vaega fa'a'ese'ese eletise (insulators, gaskets, bushings).