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Table 4

Input parameters, ranges and levels for the design of experiments.

Parameters/Levels Units I II III IV
Cutting speed (v) (m/min) 70 140 210 280
Feed (f) (mm/rev) 0.05 0.1 0.15 0.2
Depth of cut (d) (mm) 0.1 0.2 0.3 0.4

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