underground drainage facilities

• 地下排水设备

underground drainage facilities的用法和样例：

例句

1. He came to look at the drainage.
   他是来检查排水设备的。
2. Many other smaller streams also pass through the city as well with general drainage being from the western and northern areas towards the south.
   许多其它更小的小河并且通过城市以一般排水设备是从西部和北区域往南部。