Ulayini ofaka ulaka ungaphatha izintambo zensimbi ekhabhoni ephansi ngesithando somlilo esingeziwe noma izintambo zensimbi zekhabhoni ephezulu ngaphandle kokwelashwa kokushisa.Sinesistimu yokusula ye-PAD kanye nohlelo lokusula oluzenzakalelayo lwe-N2 ukuze sikhiqize imikhiqizo ehlukene yocingo olunesisindo socingo.