English to French Tech/Engineering Materials (Plastics, Ceramics, etc.)

Rout and return
The rout and return technique consists of using shaped milling
cutters to make V-shaped or straight grooves* on the back of the
Reynobond
®
composite panel.
This allows, in most cases, the hand folding of the panels on site
without any need for a folding bench. A folding rule consisting of a U
or H-shaped profile with a lever can be used to make hand folding
easier. See paragraph «Folding», page 19.
The grooves can be made using a routing machine, a fixed panel
saw or a horizontal milling table

https://www.arconic.com/aap/europe/catalog/pdf/downloads/rey...