preventer [prɪ'ventə]

例句:

• The blowout preventer failed to shut down the well.
  来自WSJ
• The blowout preventer failed to pinch off the well.
  来自WSJ
• Ram - type blowout preventer is important equipment used in oil drilling operation.
  闸板防喷器是石油钻井过程中的一种重要设备.
  
• We do not use this valve to control the blowout preventer.
  我们不用这个凡尔控制防喷器.
  
• Backflow preventer manufactured from 300 Series stainless steel for corrosion resistance.
  防回流阀采用耐腐蚀的300系列不锈钢制造.
  
• Most common types of preventer are inhaled steroids.
  来自BBC