Ulwakhiwo olukhethekileyo olungaqhelekanga kwiimpahla zomthunzi we-roller.Olu lwakhiwo lubonelela ngembonakalo yelinen enomdla efanelekile kuzo zombini iindawo zorhwebo kunye neendawo zokuhlala zangaphakathi.Uluhlu lwayo olubanzi lwemibala, kunye nobubanzi bubonelela ngamathuba okulungelelanisa iinjongo zoyilo ezininzi ezifana nobumfihlo, ukukhanya kwemini yendalo, kunye nokuthuthuzela kwe-thermal.
