Rubber dam:Also known as rubber sluice, barrage, dam rubber or rubber dam is made of high-strength synthetic fiber fabric force skeleton, internal and external coating rubber for the protective layer, processed into tape, and then its anchoring on the floor as a closed-shaped dam bag , by charging and discharging piping bag with water (gas) to form the retaining dam inflated. Crest can overflow, and can adjust the dam needed to control the water level upstream, in order to play for irrigation, power generation, navigation, flood, tidal and other benefits.