Ungayikhetha njani umthengisi we-dadadam pepgide?
Njengoko amashishini aqhubeka nokwandisa kwimveliso ye-metallight, kunye nokugcinwa kwamandla, imfuno ye-vatoxide ye-petoxide ethembekileyo (i-v2o5 ethembekileyo.
Funda ngokugqithisileyo