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Table 3 5 S N ratio table for surface roughness Low Medium High H Material Hardness (sH) 4 01 3 4 4 04 W Workpiece speed (sW) 4 41 4 41 2 64 G Grinding wheel (sG) 6 31 2 43 2 72 Average Roughness for each parameter at three levels Tabl 3 6 mean response table for surface roughness S No Parameter Surface roughness Low Medium High H
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High-tech Zone , ZhengZhou , China