Isingeniso Somkhiqizo: 1, I-Junda chrome corundum iyimpushana ye-alumina njengento eluhlaza eyinhloko, evumelana ne-chromium oxide, encibilika ngesithando somlilo se-arc. 2, umbala opinki, ubulukhuni kanye ne-corundum emhlophe efanayo, ukuqina kuphakeme kune-corundum emhlophe. Ama-abrasives akhiqizwayo ane-charac...
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