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built drainage systems
ecol.
建成的排水系统
built drainage system
tech.
建成的排水系统
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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