distributed downcomer分散下降管
side downcomer侧面降液管
downcomer space下水空间
central downcomer中心降液管;翻译;中心降液管英语
fishtailed downcomer鱼尾喷管
downcomer liquid降液管液层
centralized downcomer集中下降管
Downcomer backup降液管液柱高度;翻译
N（名词） a pipe that connects a cistern to a WC, wash basin, etc 下水管 (Also called downcome)