dredger is widely used in dredging activities. It makes use of a cutter head equipped around the head of the suction tube to loosen and cut the sand or mud in the water. It suctions the sandy materials via the mud flowing pipeline to the deck. The digging, transporting and discharging progress can be carried out at the same time. It's of high working efficiency and low cost.  dredge is a good choice for underwater dredging activities.