Definitions for "Ridges"
Keywords:  crest, rdsu, slopes, elevation, narrow
The horizontal angle at the junction of two slopes.
long narrow crest, horizontal line formed by the meeting of two sloping surfaces.
long narrow elevations with steep sides RDSU
High or low caliper rings or bands around the circumference of a roll results in a permanent distortion (knuckle stretch) of the sheet.
Keywords:  flat, glass, above, surface, lines
Lines of glass formed above a relatively flat surface of glass.