Silungele ntoni isifudumezi-manzi somthombo womoya?

Iqhekeza lombane eli-1 linokufumana amaqhekeza ama-4 amanzi ashushu.Ngaphantsi komlinganiselo ofanayo wokufudumeza, isifudumezi samanzi samandla omoya sinokugcina malunga ne-60-70% yeebhilidi zombane ngenyanga!