vent system

基本解释

The vent system must keep the tank pressure within the permitted limits during ground pressure refueling.
飞机地面压力加油系统通气能力计算是飞机燃油系统设计的重要环节。
The vent system composed of vent groove, vent plug and clearance of ejector pin can fit the need of venting.
采用分型面排气槽、顶杆间隙排气与排气塞排气相结合的排气系统设计能够很好地满足模具排气需要。
The features of this type vent system are as follows:less requirement in equipment'reliability in control, simplicity in maintenance and management, high effectiveness.
这种系统投入设备较少，调控可靠，维护管理简便，效益显著。

And the system's underground vent system, designed to suck away smoke, isn't working.
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