Imishini yokugcwalisa isetshenziswa kabanzi ekufakweni kokudla, amakhemikhali ansuku zonke, imithi, njll. Ngokuthuthuka komnotho, izinguquko zemakethe, kanye nentuthuko kwezobuchwepheshe bokukhiqiza, ukuthuthukiswa kwemishini yokugcwalisa kuye kwabonisa izitayela ezihlukahlukene.Imishini yokugcwalisa ingaphakathi...
Funda kabanzi