Isistimu sokulawula ngokuthuthuka kwezimpilo esikhathini esizimele kuyisistimu sokulondoloza ukuthi ikhona yezinhlelo zokulondoloza izinhlelo zezibalo kusukela kumakhiwane amakhulu. Isimo sakho sokusebenza kuyisinyathelo sokunikeza umoya ongcono okhokhelwe noma umoya ongcono (kukhona kwezinye izikhathi i-nitrogen) kubandla bokuphathwa kwezibalo, ngakho-ke kuyakha isimo sokuthuthukisa isimo esiphezulu kancane kunesimo sokuphathwa kwezinye izinhlelo. Isimo sokwenza lokhu kuyisisekelo ukuthi akukho zinhlelo zokuphathwa kwezibalo noma umlotha ongakwazi ukungena esakhiweni sezibalo, ngakho-ke kuyakhiwa izikhukhula ezikhishwe esakhiweni sezibalo.