安全阀排气压力
gas vent pressure of safety valve
大气排气
atmospheric exhaust
atmospheric steam exhaust
电子设备冷却气排气口
electronic equipment cooling air exhaust port
动触杆排气孔
the hole of moving contacts
废气排气系统
exhaust emission suction system
进排气阀
air inflow and release valves
inspiration exhaust valve
Air Inbreathe-release Valve