controllable check valve

例句：

1. 1. The controllablecheck valve prevents the flow of gasfrom one side to the other.
   可控止回阀防止气体从一侧流向另一侧。
2. 2.The engineer installed a controllable checkvalve in the pipeline to ensure safe operation.
   工程师在管道中安装了可控止回阀，以确保安全运行。
3. 3. The controllable check valve isused to regulate the flow offluids in industrial applications.
   可控止回阀用于工业应用中调节流体的流动。