1. Brown corundum abrasive, makamaka yopangidwa ndi Al2O3, imakhala ndi kuuma kwapakatikati, kulimba kwakukulu, tinthu tating'onoting'ono tating'ono ndi mtengo wotsika, ndipo ndi yoyenera pokonza zitsulo zokhala ndi mphamvu zambiri.Zonse ziwiri za microcrystalline corundum abrasive ndi black corundum abrasive ndizochokera zake.White corundum
Werengani zambiri