常見例句The ground deformations in loess tunnels are divided into three types,namely ground fracture,ground collapse and settlement pit,and ponor. 已建和在建的黃土地區(qū)的很多隧道出現(xiàn)了地表變形災(zāi)害,黃土隧道的地表變形一般有以下三種類型:地表裂縫,地表塌陷和陷穴、落水洞。Catalina Ponor 波諾爾PONOR Catalina 波諾爾 返回 ponor