Isici esikhulu sokufakwa kwebhulebhu yomlandeli oyisicaba ukuthi sigcwalisa imibhobho eseduze nokuma kwesifutho cishe kwe-30% yendawo yokumboza. Ngasikhathi sinye, umumo wesifutho nomugqa ovundlile kungabizi ngo-5 ° -15 °, okwenza ukusatshalaliswa okuphelele kokusatshalaliswa kokuhamba okufanayo, okwanelisa kakhulu futhi okuthuthukile. Ukusetshenziswa kokuhlelwa konhlokweni kwemishini yokudlulisa evundlile. Ukubala kwesikhala semibhobho yefeni eyisicaba, ungabheka kwifomula elandelayo:

Uma udinga usizo lwethu ukuklanywa flat fan umlomo wombhobho Isikhala, sicela ukhululeke ukuxhumana nathi, futhi unjiniyela professional ithimba lethu uzokuphendula nawe nganoma yisiphi isikhathi.