網址: https://www.researchgate.net/publication/288496795/figure/fig3/AS:667865774555139@1536243017051/Rigid-body-and-the-vibration-table-contact-area.png
網址2: https://www.researchgate.net/figure/Rigid-body-and-the-vibration-table-contact-area_fig3_288496795
