Kusankha njira yoyeretsera gasi wachilengedwe
Mpweya wachilengedwe monga mpweya wodyetsa uyenera kuyeretsedwa bwino musanamwe madzi. Izi zikutanthauza kuchotsa mpweya wa asidi, madzi ndi zinthu zosafunika mu mpweya wodyetsa, monga H2S, CO2, H2O, Hg ndi ma hydrocarbons aromatic, kuti asazizire kwambiri...
tsatanetsatane wa mawonekedwe