As the most efficient dredger in the sand mining field, jet suction dredger , a high-pressure water pump provided of agitator to stir things up and make high-tensity sand-water mixture, use of centrifugal pumps for the transport process of moving the dredged materials out of the water and horizontally transporting sand to disposal site. This way achieves sand , Deep-digging, filtering, washing and long distance delivering are finished in one time to make drill-type dredger to be the most efficient and cost-saving deep-sand-digging dredger. The dredger is mainly used for inland B-C level navigating zone lakes, reservoirs and coastal waters sand dredging. Digging depth maximum, high production, high strengthen, high load, continuous working and good stability.