独特排水系统设计，防止风吹造成雨水和灰尘的进入。
The unique drainage system design, prevent the rain water and dust entering.
独特的排水系统设计，防止风吹成雨水和灰尘的进入。
The special catchment's system design, keeps breeze from blow to result in rainwater and dusts enter.
在公路排水系统设计中，降雨重现期是一个非常重要的参数。
In design of highway drainage system, the rainfall reappearing period is a very important parameter.
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