plural valves
plural valves
Learner's definition of VALVE
[count]
1
: a mechanical device that controls the flow of liquid, gas, etc., by opening and closing阀门;气门;闸 — see picture at plumbing; see also safety valve 2
: a device in some musical instruments (such as trumpets) that you press to play different notes(小号等乐器的)阀键,活塞 — see picture at brass instrument 3
medical : a structure in the heart, stomach, etc., that temporarily stops the flow of fluid or that allows fluid to move in one direction only(心脏、胃等的)瓣,瓣膜