Inkcazelo emfutshane:

Umzila wokugijima owenziwe ngamanzi unokungena kwamanzi okugqwesileyo, ubulukhuni obuphakathi kunye no-elasticity, iipropati zomzimba ezizinzileyo, kunye nokusebenziseka okugqwesileyo kwindawo yokufuma okuphezulu, okunenzuzo kwisantya sabadlali kunye nobuchwepheshe, ukuphucula ngokufanelekileyo ukusebenza kwabo kwezemidlalo kunye nokunciphisa izinga lokuwa.Ixabiso lolu hlobo lwendawo liphantsi, kwaye ubomi benkonzo ngokuqhelekileyo buyiminyaka emi-5-6.