1. Brown corundum abrasive, haholo-holo e entsoeng ka Al2O3, e na le boima bo bohareng, boima bo boholo, likaroloana tse bohale le theko e tlaase, 'me e loketse ho sebetsana le litšepe tse nang le matla a phahameng a thata.Ka bobeli microcrystalline corundum abrasive le black corundum abrasive ke lihlahisoa tsa eona.White corundum Whit...
Bala haholoanyane