n.瓣膜；真空管；閥門；電子管
The valve of the heart allows the blood to pass in one direction only. 心臟的瓣膜使血液只能朝一個方向流動
We need a valve detector. 我們需要個真空管檢波器。
We need an eye bolt to fit this valve. 我們需要一個有眼螺栓來固定這個閥門。
Have you turned off the water valve? 你關掉水閥了嗎？
John Ambrose Fleming invents the two-element "Fleming Valve". 約翰.
Valve actuators have not been correctly adjusted. 電子管驅動器還沒有正確調整。
n.瓣膜；真空管；閥門；電子管
雙殼類,蚌類
