Izifudumezi zolwelo, izifudumezi ezijikelezayo, izifudumezi zolwelo, ukusebenza kobugcisa kunye neempawu;izifudumezi zombane ezinolwelo, ubushushu buqulunqwe ngezinto zokufudumeza zombane ezintywiliselwe kumajelo omanzi (amanzi, i-oyile, umoya kunye nolwelo lweekhemikhali, njl. njl.) ezenziwe kwaye zidluliselwe.Xa isifudumezi sombane sisebenza...
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