smooth water course的意思|示意

Base course treatment - the base course surface shall be smooth, solid and free from acute angles, floating dust or water, and go through good waterproof node processing as required in the design.

基层处理——基层表面应平整，坚实、无尖锐角、浮尘和明水，并按设计要求做好防水节点处理。

Dredging the river aims at keeping the river course smooth and water clean.

清挖河道是为了保持河道畅通，河水清洁。