info@bestmytest.com IELTS prep coming soon

valve

Find out how TOEFL Tutor can help you improve your score with a 7 day free trial

definition: 
A device for controlling the passage of fluid through a pipe or duct, especially an automatic device allowing movement in one direction only:
sentence: 
The system is regulated by a height control valve which allows fluid to move between spheres to keep the car level.
difficulty: 
medium
toefl frequency: 
1