... renewal rate 延期利率 air renewal 换气 soil renewal 土壤再生 ...
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air renewal system 换气系统
air renewal duct 换气风道
air renewal fan 换气风扇
air renewal ventilator 换气通风机
air renewal rate 空气更新率
air renewal ventiator 换气通风机
air renewal ventilator detail 换气通风机
renewal of air 换气
renewal l of air 换气
Dual pipe air supply systems were also added in DF 11 locomotives as a main speed up locomotive, and the relevant renewal of this type at depots were conducted.
东风11型机车作为提速的主型机车也加装了双管供风系统，并对在段的该型机车进行了相应的改造。
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