Today the corrugation process is carried out using the process of roll forming.
From the en.wikipedia.org
A few times each year, the corrugation of cliffs to the west would enjoy a brief downpour.
From the independent.co.uk
Many materials today undergo the corrugation process.
From the en.wikipedia.org
In the corrugation process sheet metal is pulled off huge rolls and through rolling dies that form the corrugation.
From the en.wikipedia.org
Wouldn't have passed a fire inspection, but you could lie in bed, reach up and draw on the ceiling, although the corrugation made for wavy lines.
From the freep.com
The HiLux rides competently, particularly when the back is loaded up and those big rear springs are given some work to do other than bounding off every corrugation in the road.
From the au.news.yahoo.com
Along with every exposed corrugation, he renders each little ding and tear such boxes might have registered in their histories of moving and storing objects more valuable than themselves.
From the chron.com
Over millennia, the ocean waves have pummelled the coast into an alluring corrugation of beaches and cliffs, and today they toy with surfers and provide a backdrop for dream holidays.
From the independent.co.uk
A locally excessive charge attracts the airborne dipolar particles in its immediate vicinity, which attach themselves, and a small corrugation in the flat frozen surface appears.
From the newscientist.com
More examples
A ridge on a corrugated surface
The act of shaping into parallel ridges and grooves
(corrugate) fold into ridges; "corrugate iron"
(corrugated) shaped into alternating parallel grooves and ridges; "the surface of the ocean was rippled and corrugated"
(corrugated) marked with parallel folds, ridges or furrows; bent into regular curved folds or grooves
(Corrugations) Deformation of an unsurfaced track taking the form of transverse, close-pitch undulations - ie at right angles to the direction of the track. Sometimes referred to as 'washboard'.
(Corrugations) regular small gutters across an un sealed road
(Corrugate) loosely wrinkled or crumpled
(Corrugated) Folded or shaped into parallel ridges or furrows so as to form a symmetrically wavy surface.