Table 8 Cut edge angles (∠), tangent heights (y), and their deviation from the central axis (x) between the bowl foot and bowl wall
Sample | Lowest Foot-side Junction Angle | Highest Foot-side Junction Angle | Foot-side Top Intersection Angle | ||||||
|---|---|---|---|---|---|---|---|---|---|
Angle/∠| Y/cm | X/cm | Angle/∠| Y/cm | X/cm | Angle/∠| Y/cm | X/cm | |
4 | 50° | 1.84 | 3.78 | 63° | 5.95 | 5.50 | 60° | 0.65 | 2.29 |
5 | 47° | 1.64 | 3.53 | 58° | 5.47 | 4.90 | 55° | 0.67 | 2.10 |
6 | 48° | 1.68 | 3.51 | 58° | 5.65 | 5.52 | 55° | 0.74 | 2.11 |
7 | 50° | 1.48 | 3.45 | 60° | 4.84 | 4.95 | 58° | 0.59 | 2.28 |
8 | 51° | 2.05 | 3.88 | 63° | 5.36 | 5.43 | 60° | 0.89 | 2.33 |
9 | 50° | 1.54 | 3.24 | 60° | 4.84 | 4.20 | 58° | 0.60 | 1.94 |
10 | 52° | 0.72 | 4.05 | 62° | 4.35 | 4.05 | 62° | 0.22 | 1.82 |
14 | 55° | 1.72 | 3.45 | 63° | 4.44 | 4.55 | 57° | 0.83 | 2.20 |
15 | 51° | 0.94 | 2.46 | 61° | 4.26 | 4.04 | 60° | 0.45 | 1.80 |
16 | 44° | 1.31 | 4.92 | 52° | 3.96 | 4.92 | 49° | 0.41 | 1.85 |
17 | 54° | 0.90 | 3.42 | 62° | 3.25 | 3.24 | 61° | 0.22 | 1.52 |
Average | 50.18° | 1.43 | 3.60 | 60.18° | 4.76 | 4.66 | 57.72 | 0.57 | 2.02 |
Middle value | 50° | 1.54 | 3.51 | 61° | 4.84 | 4.9 | 60 | 0.6 | 2.1 |
Difference value Δ |  + 0.18 | − 0.11 |  + 0.09 | − 0.82 | − 0.08 | − 0.24 | − 2.28 | − 0.03 | − 0.08 |