Phambi kokuqala, ukubekwa kombhobho wamanzi okwesikhashana kufuneka kugqitywe ngokwenkqubo yokwakhiwa, ngaphandle kokuqhupha kwamanzi okude okubalekayo. Umbhobho wesikhashana uya kugcinwa ngokweemithetho ngokweemithetho, kwaye ekugqibeleni ukhululwe kumbhobho okhethiweyo.
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