Monga tikudziwira, popanda chuck yoyenera ya mpweya, ndizosatheka kutulutsa tayala.Ndiko kunena kuti, chuck ya mpweya imalola mpweya kuyenda m'njira yoyenera.Ngati palibe mpweya wotuluka kuchokera ku kompresa kupita ku tayala, chuck ya mpweya imatha kuletsa kutuluka kwa mpweya mu tayala.Air pressure ikafika...