Imathiriyeli ekrwada kunye nokwakheka kweekhemikhali Iibhetshi zeglasi yebhotile ngokubanzi zibandakanya iintlobo ezisi-7-12 zemathiriyeli ekrwada.Kukho ubukhulu becala isanti yequartz, i-soda ash, i-limestone, i-dolomite, i-feldspar, i-borax, i-lead kunye ne-barium compounds.Ukongeza, kukho izinto ezincedisayo ezifana nezicacisi, i-colorants, i-decolora ...
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