下闸

lower sluice gate / outflow sluice

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

old variant of 閘|闸[zha2] / sluice / lock (on waterway)

gear / brake / sluice / lock (on waterway) / electric switch or circuit breaker