Pakugadzira, vanhu vanoisa pfungwa dzavo pakugadzira zvinhu zvakatikomberedza uye kushandisa simba idzva. Tora "ivhu rakasvibira" senhungamiro yekugadzira.
Zvigadzirwa zvikuru zvinoti Lead Nitrate, Zinc Sulphate, Sodium Metabisulphite, uye Sodium Persulphate.
Hofisi Yedu
