Gawaarida duuban ee duuban ayaa ah biraha kala duwan, gudaha iyo gudaha siddooyinka xamaarka waxay leeyihiin dariiqyo orod.Noocyada noocaan ah waxay u qaybsan yihiin noocyo dhismeed oo kala duwan sida hal saf, saf labajibaaran iyo afar saf oo rullaluistuyaal ah oo duuban iyadoo loo eegayo tirada saf ee rullalulaatada lagu rakibay.Xadhkaha rullaluistuyada safka keli ah ee duuban waxay u adkeysan karaan culeysyada shucaaca iyo culeyska dhidibka ah ee hal jiho ah.Marka xajinta la saaro culeyska radial, qayb ka mid ah axial ayaa la soo saari doonaa, sidaas darteed xajin kale oo u adkeysan karta xoogga axial ee jihada ka soo horjeeda ayaa loo baahan yahay si loo dheellitiro.