1, ilaphu legridi yealkali-resistant iglasi yefayibha ukugcina amazinga aphezulu, ixesha elide;
2, ilaphu legridi yealkali enganyangekiyo kwiglasi yefayibha impembelelo entle yokuchasa, ukomelela okuphezulu;
3, isixa esikhulu sealkali-resistant iglasi ifayibha igridi ilaphu igridi eqatywe igridi ayilahlekanga;
I-4 eguquguqukayo elungileyo, ilaphu legridi ye-alkali-resistant iglasi yefayibha, yaphuka lula.
Ixesha lokuthumela: Jun-21-2017
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