pit retaining system

• 基坑支护

pit retaining system的用法和样例：

例句

1. New design and execution techniques are adopted in South Anchor Cushion Foundation Pit,namely freezing method of row piles.
   其南锚定基础深基坑支护采用了钻孔灌注桩排桩加多道支撑挡土的排桩冻结法。