1)canal,导沟(玻);流槽2)flow-field channels,流场沟槽3)micro-jet induced groove defect,沟槽微射流4)gutter,流<沟，出料>槽5)diversion open channel,导流明沟6)blind ditch diversion,盲沟导流
用法和例句
When water to be drained and dropping head o f foundation delve are small, filter diversion, duct diversion, well draining an d blind ditch diversion can be adopted.