1. Abrasive corundum Brown, oo inta badan ka kooban Al2O3, wuxuu leeyahay qallafsanaan dhexdhexaad ah, qallafsanaan weyn, qaybo fiiqan iyo qiimo jaban, wuxuuna ku habboon yahay biraha xoogga leh ee adag.Abrasive-ka microcrystalline corundum iyo abrasive corundum madow labaduba waa ka-soo-saarkeeda.Korundum White Whit...
Akhri wax dheeraad ah