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Table 2 Extraction data of surface roughness

From: Research on Surface Roughness of Supersonic Vibration Auxiliary Side Milling for Titanium Alloy

Serial number yi (μm) Absolute value of yi (μm)
1 0.9886 0.989
2 0.8354 0.835
3 0.145 0.145
4 0.552 0.552
5 0.6107 0.611
6 0.6417 0.642
7 0.7232 0.723
8 0.401 0.401
9 0.46 0.46
10 0.6516 0.652
11 0.224 0.224
12 0.1885 0.189
13 0.435 0.435
14 0.55 0.55
15 0.6506 0.651
16 0.647 0.647
17 0.479 0.479
18 0.512 0.512
19 0.1057 0.106
20 0.1678 0.168
21 0.216 0.216