落水管

例句：

1. 1. The plumber fixed the leaky pipe.
   水管工修好了漏水的管子。
2. 2. The rainwater was directed into the underground drainage system.
   雨水被引导到了地下排水系统。
3. 3. The construction crew installed new pipes for the new building.
   建筑工人为新大楼安装了新的管道。