Insimbi engagqwali engu-1.201 ifanele ukusetshenziswa endaweni eyomile futhi kulula ukuyigqwala uma imanzi.
Insimbi engagqwali engu-2.304, efanelekile endaweni engaphandle noma enomswakama, enokumelana okunamandla kokugqwala kanye ne-asidi.
Insimbi engagqwali engu-3.316, i-molybdenum eyengeziwe, ukumelana nokugqwala okwengeziwe kanye nokumelana nokugqwala okunemigodi, okufanelekela kakhulu amanzi olwandle noma amakhemikhali.
Isikhathi sokuthunyelwe: Okthoba-27-2021