In tunnels, a lashing backwind fills the cab with soot.

过隧道时，反向风把煤灰灌进驾驶。

Furthermore, as the total step height is the same, the combustor configuration with one backwind step has higher performance than the combustor configuration with two backwind step.

阶度条件下,单阶结构燃烧具有更好燃烧性能。