Qufulka waalka kubbadda wuxuu qufulaa tubooyinka kala duwan ee kala duwan isagoo gacanta ku haya booska OFF.Qalabkeena yar ee qufulka waalka kubbadda ayaa ka xidhi doona dhexroorka tuubada 1/2'ilaa 3'.Qufulka badbaadada ee waalka kubbadda weyn ayaa quful dhexroorka tuubada min 2′ ilaa 8′.Qalabka qalabku sidoo kale way kala duwan yihiin marka loo eego codsiga.Waxa kale oo jira qufulka birta caadiga ah ee kubbadda, laakiin waa la xidhi karaa oo keliya.