N-COUNT (把雨水从屋顶输送到下水道的)雨水管,排水管 A
downspout is a pipe attached to the side of a building, through which water flows from the roof into a drain.
(把雨水从屋顶输送到下水道的)雨水管,排水管 [US] in BRIT, use 英国英语用 drainpipe
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