expression, godan verb (-ru)
to take the radius; to round off a corner to a specified radius
Technical phrase used in design, drafting, and machining to indicate creating a rounded corner with a given radius.
この角はアールをとって滑らかに仕上げてください。
Please round off this corner smoothly.
設計図では、ここにアールをとる指
The blueprint includes an instruction to round this corner.