built drainage systems – Chinese translation

built drainage system Collection of open and/or closed drains, together with structures and pumps used to collect and dispose of excess surface or subsurface water

environ.

排水系统 (开放和/或关闭的排水管道，和用来收集和消除地表多余的水或地下水的结构和管道一起，组成的集合。)

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