n.瓣膜；真空管；阀门；电子管
The valve of the heart allows the blood to pass in one direction only. 心脏的瓣膜使血液只能朝一个方向流动
We need a valve detector. 我们需要个真空管检波器。
We need an eye bolt to fit this valve. 我们需要一个有眼螺栓来固定这个阀门。
Have you turned off the water valve? 你关掉水阀了吗？
John Ambrose Fleming invents the two-element "Fleming Valve". 约翰.
Valve actuators have not been correctly adjusted. 电子管驱动器还没有正确调整。
n.瓣膜；真空管；阀门；电子管
双壳类,蚌类
