... 2,mine water pump 3,underground mine water pump Type D,DG,MD,DF,DY Multi-stage Centrifugal Pump:The serial pump is multi-stage sectional centrifugal pump with the ... pump. Type D pump pressure water come from pump itself, type DG, MD, DF, DY pump pressure water is come from pump itself or outer water, type DG, MD, DF, DY pump ...