| 例句 |
penstocksnounpl. of penstock a long hollow cylinder for carrying a substance (as a liquid or gas)a penstock carried water for the waterwheel channels, conduits, ducts, leaders, lines, pipes, troughs, tubes drainpipes, drains, funnels, hydrants, mains, smokestacks, spouts, standpipes, stovepipes, tiles, waste pipes, waterspoutspipages(or pipeages), pipelines, pipings |