tünnikujulise profiiliga valts, kompenseerimaks valtsile mõjuvate jõudude poolt esilekutsutavat läbipainet ja sellega kaasnevaid valtsmetalli kujuhälbeid, a roll in which the diameter is continuously decreasing non-linearly from the center point to both ends to counterbalance the bending of the rolls when they are subjected to high pressures during rolling