underbreak
美
英 
例句
Research on relation among surrounding rock classification, tunnel radii and overbreak-underbreak of tunnels
隧洞圍巖分類與洞徑和超欠挖之間的關系研究
Image processing on the evaluation of overbreak and underbreak in the tunnels
圖像處理技術在隧洞超欠挖評價中的應用