... polyester fabric, the dam with high tensile strength, with the shape of the advantage, in the long-term use of deformation.2,Anchoring clamping ... completely flat, rubber dam, rubber dam lie not water resistance. An independent air evacuation system channel will air evacuation to the ... cloth three glue, monolayer thickness of 10 mm L×W=20m×2m The standard: China's Ministry of water resource(SL227-98) ...