Iglasi yimathiriyeli ye-amorphous inorganic non-metallic.Ngokuqhelekileyo yenziwe ngeendidi zamaminerali angabonakaliyo (njengesanti yequartz, iboraksi, i-boric acid, i-barite, i-barium carbonate, i-limestone, i-feldspar, i-soda ash, njl. zongezwa....
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