Before revision: These conditions include being out-of-round (that is, lacking sufficient roundness , which creates asymmetry ); eccentricity (that is, lacking sufficient concentricity); or being bent axially (regardless of whether the surfaces are perfectly round and concentric at every cross-sectional point).
After revision: These conditions include being out-of-round (that is, lacking sufficient roundness ); eccentricity (that is, lacking sufficient concentricity); or being bent axially (regardless of whether the surfaces are perfectly round and concentric at every cross-sectional point).