Brown corundum abrasive, te nuinga tito o Al2O3, he reo pakeke, pakeke nui, matūriki koi, utu iti, a he pai mo te tukatuka konganuku ki te kaha tensile tiketike.Ko te microcrystalline corundum abrasive me te pango corundum abrasive ko o raua hua.
Wā tuku: Maehe-01-2023