Malo omwe zitsulo zimasungidwa, mkati ndi kunja kwa nyumba yosungiramo katundu, ziyenera kukhala zoyera ndi zowuma, kutali ndi zokambirana za fakitale zomwe zimapanga mpweya woipa ndi fumbi, osati kusakaniza ndi zidulo, alkali, mchere, mpweya, ufa ndi zinthu zina.Kusungirako kuyenera kukhala c...
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