Cov khoom sib tw poob rau hauv qeb ntawm cov khoom tawg yooj yim, thiab hmoov phom yog categorized li ib yam khoom tawg.
Vim qhov tsim nyog ntawm qhov qhib nplaim taws rau ignition, phom phom tsis tsim nyog raws li cov khoom siv hluav taws xob rau ib tus se.