dry vent

• 干式通气管

dry vent的用法和样例：

例句

1. A pilot-operated vent valve for pressure relief uses tank pressure, not weights or a spring, to keep the vent valve seat closed.
   先导式通气阀泄压时利用储罐压力，而不是重力或弹簧外力，来保持通气阀阀座关闭。