723919.fig.004a
(a)
723919.fig.004b
(b)
723919.fig.004c
(c)
Figure 4: Stereometric image of surface after machining and its profilogram (a) the EDM—U =120 (V), I = 24 (A), Ti = 200 (μs), and the following roto-peen (b)  (rev/min),  (min), (c)  (rev/min),  (min).