Li-naetrojene tsa metsi hangata li bolokoa ka khatello e tlase, empa tanka eo e lokela ho khona ho mamella khatello e itseng ea kahare. Khatello ea Dission hangata e chitja ea 0,1 MPA (1 bar), empa boleng bo ikhethileng bo its'etleha ho kopo ea 'nete le polokeho ea polokeho.