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Iglasi yesiseko esinzima
Isiseko esinzima yiglasi eyilwe ngokukodwa, ephawulwa ngesiseko sayo esomeleleyo nesinzima. Yenziwe ngeglasi ekumgangatho ophezulu, olu hlobo lweglasi lwenziwe ngononophelo kwisakhiwo esisezantsi, songeza ubunzima obuninzi kunye nokubonelela abasebenzisi ngamava omsebenzisi azinzile. Ukubonakala kweglasi yesiseko esinzima kucacile kwaye kucacile, kubonisa i-crystal imvakalelo ecacileyo yeglasi ephezulu, okwenza umbala wesiselo ukhanye.
