1. Brown corundum abrasive, feem ntau yog tsim los ntawm Al2O3, muaj nruab nrab hardness, loj toughness, ntse hais thiab tsis tshua muaj nqi, thiab yog haum rau ua hlau nrog siab tensile zog.Ob leeg microcrystalline corundum abrasive thiab dub corundum abrasive yog nws cov derivatives.Dawb corundum Whit...
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