twin flapper-and-nozzle valve

例句：

1. 1.This valve is used in the water system to control the flow of water.
   这种阀门用于水系统中控制水流。
2. 2. The twin flapper-and-nozzle valve was designed for high-pressure applications.
   这种双瓣式活门阀是为高压应用设计的。
3. 3. The twin flapper-and-nozzle valve has been proven to be reliable and efficient in many industrial applications.
   这种双瓣式活门阀在许多工业应用中已被证明是可靠和高效的。