Normal
'flame surfacing gives body surfaces the freedom to turn in on themselves and create a series of concave and convex desin lines'.concave: is curved inwards in the middleconvex: curved outwards, like the surface of the eyeeconomics term...
'flame surfacing gives body surfaces the freedom to turn in on themselves and create a series of concave and convex desin lines'.
concave: is curved inwards in the middle
convex: curved outwards, like the surface of the eye
economics term...