A cylindrical iavteeb, feem ntau hu ua "cov iav", muaj ob los yog ntau dua cylindrical iav nrog cov hniav uas mesh ua ke kom xa cov lus tsa suab thiab lub zog ntawm cov rotating shafts. Cov iav no yog cov khoom tseem ceeb hauv ntau lub tshuab siv tshuab, suav nrog gearboxes, automotive transmissions, industrial machinery, thiab lwm yam.
Cylindrical iav teeb muaj ntau yam thiab cov khoom tseem ceeb nyob rau hauv ntau yam ntawm cov tshuab siv tshuab, muab lub zog xa hluav taws xob zoo thiab kev tswj xyuas hauv kev suav tsis txheeb.