fence
A fence is a structure that is provided for the purpose of preventing intrusion of people, vehicles, etc. in order to separate the boundary of two lands with different owners and uses, and to prevent falling from a cliff or the like. Make wood, bamboo, pile etc as struts at regular intervals and fix the crossbar (or bamboo) laterally so as to pass it. Ropes and chains are sometimes used instead of crossbars. Unlike the fence, there is a gap, and you can see the scenery through the fence. The structure is the same, but if you read it as a slogan, it refers to what was established in the river to suppress water flow. ...