Igama elithi “ithubhu engu-3/4 intshi” ngokuvamile libhekisela kububanzi bangaphandle (OD) bethubhu. Ukuze unqume ububanzi bangaphakathi (ID), udinga ulwazi olwengeziwe njengobukhulu bodonga. Ububanzi bangaphakathi bungabalwa ngokususa kabili ubukhulu bodonga kububanzi bangaphandle. Akunakwenzeka ukuthola ububanzi bangaphakathi obuqondile bethubhu engu-3/4 intshi ngaphandle kokwazi ubukhulu bodonga.