1. E tusa ai ma mea eseese, e mafai ona vaevaeina abrasives i metallic ma non-metallic abrasives.Nonmetallic abrasives e masani ona aofia ai oneone apamemea, oneone quartz, oneone vaitafe, emery, enaena fused alumina, paʻepaʻe fused alumina ipu tioata, ma isi. Ona o le fua faatatau nutimomoia sili ona maualuga...
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