inlet manhole

例句：

1. 1.The inlet manhole is located at the bottom of the river.
   入口井位于河流底部。
2. 2. The inlet manhole was designed to prevent water from flowing into the city.
   入口井设计用来防止水流入城市。
3. 3. The inlet manhole was closed for maintenance due to a leak.
   由于泄漏，入口井被关闭进行维护。