例句 |
ductsnounpl. of duct a long hollow cylinder for carrying a substance (as a liquid or gas)air ducts to provide ventilation channels, conduits, leaders, lines, penstocks, pipes, troughs, tubes drainpipes, drains, funnels, hydrants, mains, smokestacks, spouts, standpipes, stovepipes, tiles, waste pipes, waterspoutspipages(or pipeages), pipelines, pipings |