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Wamphamvu komanso Wodalirika Kokani Mutu wa Dredger
Monga poyambira kukhudzana ndi dothi mutu wokoka ndi wofunikira kwambiri pakugwetsa. Zomwe takumana nazo zaka zambiri zimatithandiza kupanga njira zabwino kwambiri zokoka mutu, zomwe zimatha kuchotsa dothi lalikulu kuchokera pansi pa nthawi yaifupi komanso pamtengo wochepa.
