The crankcase ventilation system carries fresh air through the crankcase. 曲轴箱通风系统要携带新鲜的空气通过曲轴箱。
The crankcaseventilation system, using a road-draft tube, vented the crankcase vapors and blow-by gas into the atmosphere. 采用行车抽吸管的曲轴箱通风系统，给曲轴箱内的蒸气和窜漏气体排入大气提供了出口。
