A sluice (from the Dutch "sluis") is a water channel controlled at its head by a gate. A mill race, leet, flume, penstock or lade is a sluice channelling water toward a water mill. The terms sluice, sluice gate, knife gate, and slide gate are used interchangeably in the water and wastewater control industry.
英英词典
sluice gate n.
regulator consisting of a valve or gate that controls the rate of water flow through a sluice
synonymous: sluicegate, sluice valve, floodgate, penstock, head gate, water gate