High-efficiency heat exchange and rear panel air vents ensure maximum air flow. 高效率的熱交換和背板通氣孔保證了最大空氣流量。
Air flow is also enhanced through BMW's trademark kidney grilles, with the usual vertical slats replaced by wire mesh. 空氣流量也透過(guò)寶馬的商標腎臟窗花，與通常的垂直縫翼代替鐵絲網(wǎng)。
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