alfalfa valve

例句：

1. 1.The alfalfa valve is an important part of the irrigation system.
   苜蓿阀是灌溉系统的重要组成部分。
2. 2.The alfalfa valve is responsible for controlling the flow of water through the irrigation system.
   苜蓿阀负责控制通过灌溉系统的水流。
3. 3. The alfalfa valve was installed at the beginning of the irrigation season to ensure efficient water distribution.
   在灌溉季节开始时安装苜蓿阀，以确保水的有效分配。