I-Tasical Series Vertical Row inephedi yesifuba elungisekayo nobude besihlalo futhi inganikeza indawo yokuqala ngokuya ngosayizi wabasebenzisi abahlukene.Idizayini yesibambo emise okuka-L ivumela abasebenzisi ukuthi basebenzise izindlela zokubamba ezibanzi nezincane ukuze baziqeqeshe, ukwenza kusebenze kangcono amaqembu emisipha ahambisanayo.