The third step: education, whether the maintenance personnel check dress requirements, highway repair and support type signal standard car is normal.
第三步： 产教育工作，检查维修作业人员的着装是否符合要求、公路抢修车及托式信号标车是否正常。
2
The scour of subgrade along river side is a main type of the highway washout of flood, the maximum scour depth would effect the subgrade safety directly.
沿河公路路基冲刷是公路水毁中的一个主要类型，而最大冲刷深度将直接影响沿河路基的安全。
3
The cliff debris subgrade is a special type of subgrade in mountainous highway construction.