cross curvature in a sentence

1. Most familiar and superior solution for the Steel Belt's Cross Curvature is Shot Peening.
2. In this process a steel belt that has a cross curvature can be flattened by peening the concave surface to stretch it and thereby removing the cross-curvature by equalizing the surface length across the belt between the previously concave and convex surfaces.
3. It's difficult to find cross curvature in a sentence.