Table 2: Comparison of the measurement precision.

Measurement pointMeasured height V1 (mm)Measured height V2 (mm)Standard height (mm)V2 error (mm)

P123.28123.39823.412−0.014
P24.3684.2244.2010.023
P323.35023.39723.420−0.023
P421.78221.70121.6110.090
P59.4359.4039.418−0.015
P616.67316.51816.541−0.023
P78.4258.4978.507−0.010
P86.2476.3346.3130.021
P96.2696.3456.3270.018
P1023.35923.42923.446−0.017