double-walled dredge pump--- 1.material:Cr26-30CrNiMo 2.dilivery volume: 1200m3/h-22000m3/h 3.suck sand &mud double-walled dredge pump------1.material:Cr26-30CrNiMo2.dilivery volume: 1200m3/h---22000m3/h3.suck sand &mud4.energy conservation5. Advanced hydraulic model, CAD three-dimensional design, high efficiency, significant energy saving, large deepening, high concentrations dredging, ...