impervious structure

• 防渗结构

impervious structure的用法和样例：

例句

1. It is one of the efficient impervious structure of pouring asphalt concrete used for the RCCD and the serious seepage dam in the recent years.
   浇筑式沥青混凝土是新建碾压式混凝土坝和渗漏严重的病险坝修补的一种有效的防渗结构。