draw-door weir

例句：

1. 1. The old house had a draw-door weir that was worn out and needed to be replaced.
   这所老房子有一个门闩式挡水坝，已经磨损得需要更换了。
2. 2.The engineer used a draw-door weir to control the flow of water during construction.
   工程师使用门挡式挡水坝来控制施工期间水流。
3. 3. The draw-door weir is an important part of the flood control system in this area.
   门挡式挡水坝是该地区防洪系统的重要组成部分。