Chain dredgers workload: 60. When away from the shore, can conveyorized or supporting transport ship or large head hit the gravel pumps (100 meters). The latest development and production of a large double bucket dredging equipment (dig depth of up to 30 meters) and long-distance water transport, the integration of the entire screening device, which can yield triple, to be completed at the same time sand mining, screening, separating processes, time production of qualified products, especially suitable for wide and rich underwater sand water resources of rivers, ponds and abandoned the battlefield. The product has a low cost, high efficiency, easy to operate, in the same industry leading level. Volume: 50 Category: efficient pumping sand shore, the lake efficient pumping sand. Drilling formula dredgers: sand resource extraction from rivers, lakes and reservoirs in the machinery of a vessel. Workload: 60--250m3 / hour. Power: diesel engine or generator set.