干井通风排气道
drywell ventilation exhaust duct
排气通风
Exhausting and ventilating
exhaust ventilation
排气通风系统
exhaust system ventilation
off-gas vent system
全面的排气通风
general exhaust ventilation
曲轴箱通风通气孔
crankcase ventilation breather
二次风供风系统
secondary wind system of control
增压供气风机
pressurization supply fan
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
废气排气系统
exhaust emission suction system