Folasaga o oloa: 1, Junda chrome corundum o le paʻu alumina e avea ma mea mataʻutia autu, faʻafetaui i le chromium oxide, faʻafefeteina e le ogaumu arc vevela maualuga.2, o le lanu piniki, maaa ma paʻepaʻe corundum tutusa, toughness e maualuga atu nai lo papaʻe corundum.O abrasives gaosia e iai le uiga...
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