They stopped adding smell into the ventilation system of the subway train or of the car of the train months before.
这种在地铁通风系统、或者只是在某一节车厢的通风系统内添加臭味的行为几个月前才停止。
Via the study of existing ventilation system of the kitchen in the air-conditioning dining car, a new ventilation system was designed.
通过对现有空调餐车厨房通风系统的研究，设计了一种新的通风系统。
The inside equipment seems a bit not well maintained. The ventilation fan switch is broken, and the interior floor indicator shows 'G' with the car actually at 1/F.
内笼的设备看来有些少维修不妥当：抽气风扇的开关掣破烂了，而机内楼层显示器于客卡实际上在1字楼时却显示'G'。
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