Brown corundum abrasive, e masani ona aofia ai le Al2O3, e feololo maʻaʻaʻa, tele faigata, mea maʻai, tau maualalo, ma e talafeagai mo le gaosia o metala ma le malosi maualuga.Microcrystalline corundum abrasive ma black corundum abrasive o latou mea e maua mai.
Taimi meli: Mati-01-2023