taper pipe

例句：

1. 1. The taper pipe is used to regulate the flow of fluid in a pipeline.
   缩口管用于调节管道中流体的流动。
2. 2. The constricted pipe restricts the passage of gases through it.
   节流管限制了气体通过它。
3. 3. The taper pipe is commonly used in refrigeration systems to reduce heat loss.
   缩口管在制冷系统中常用来减少热量损失。