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

过隧道时，反向风把煤灰灌进驾驶室。

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.

在定的条件下,单结构的燃烧室具有更好的燃烧性能。