1.Three functions of cleaning, dehydration and grading. 2.Used for sand factory,electric pole factroy and so on. The product is mainly used for sand factory ,electric pole factory,worksite of building and concrete dam to wash,classifying and de-watering various sands.This sand washer adopt inclination of 15',under the water tub,three weir plates form the sediment pool,the screw head is immersed ...