Ungawazi njani umgangatho wesixhobo sokucoca amanzi?
Into yokuqala yokucoca amanzi, ebizwa ngokuba yi-PP cotton, idlala indima ekuhluzeni okurhabaxa, ekuhluzeni umhlwa, kwi-sediment, nakwezinye iinxalenye ezinkulu zokungcola. Ngokubanzi, xa ufumana...
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