Valve - opening

• 阀门开启

Valve - opening的用法和样例：

例句

1. The stem rises and lowers as the valve is opened and closed.
   当阀门开启或关闭时，阀杆上升或下降。
2. The valve opens for tank discharge when tank head pressure is greater than valve inlet pressure.
   当容器水头压力大于阀门进口压力时，阀门开启进行容器排放。