fan outlet meaning in Chinese

电扇出线口
风扇出风口

Passages reserved for connecting the engine room to the outside ( e . g . , the cooling fan outlet , the exhaust outlet , the ventilation outlet , etc . ) must be designed as muffling passages , whose insertion loss should also be equivalent to the sound insulation amount of the fender structure . only in this way can the environmental noise outside the engine room live up to the standard
为机房与外界相通而预留的通道（如冷却风扇出口、发动机排气出口、机房通风换气口等）必须设计成消声通道，其插入损失也应与围护结构的隔声量相当，只有这样做才可保证机房外的环境噪声达标。