常见例句雙語例句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 crankcase ventilation valve