backwind

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

过隧道时，反向风把煤驾驶室。

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.

在台阶高度一定的条件下,单台阶结构的燃室具有更好的燃性能。