positive crankcase ventilation
常见例句
- All automobile engines now built are equipped with the positive-crankcase ventilation system of crankcase emission control.
所有現代制造的汽車發動機，都需要裝備控制曲軸箱有害汙染的曲軸箱強制通風系統。 - The positive crankcase ventilation valve and gas caps with air-pollution control valves reduce volatile organic compound loss.
曲柄軸箱通風閥和配有廢氣帽的空氣汙染控制閥（的使用）對減少揮發性有機混郃物釋放有積極作用。 返回 positive crankcase ventilation