air ventilation
短语词组
- fresh air displacement ventilation 新风置换通风
- air exhausted ventilation 抽出式通风
- blast air and ventilation 送排风
- air change ventilation system 置换通风系统
- air outlet ventilation 排气通风
- air inlet ventilation 进气通风
- night air -ventilation 夜间通风
- air condition ventilation 空调通风
- civil air defence ventilation 人防通风 返回 air ventilation