723919.fig.008
Figure 8: Specification of the resulting resistance to abrasive wear for friction with lubrication of the samples of tool steel NC10 machined by grinding and by the EDM: U = 80 (V), I = 48(A), Ti = 400 (μs), and EDM + roto-peen:  (rev/min),  (min), and  (obr/min),  (min).