Each lockout valve is equipped with an emergency shutoff feature that quickly exhausts all downstream air to atmosphere.
每个锁定阀配备了紧急关断功能，很快用尽所有下游的空气气氛。
2
Pressure regulating AND SHUTOFFvalve PRSOV, a valve in the pneumatic system for regulating bleed air pressure from the engine to the pneumatic manifold.