... : 4 - 21m ISO certificate CE certificate Submersible Axial-Flow/Mixed-Flow Sewage Pump. Specifications:1) Features: a) High efficiencyb ... internal winding temperature protection device, can be equipped with control cabinet, reliable operation. 3. Low noise, long service ... the ecessary selection. ApplicationQZ QH series, reliable, mixed flow pump application scope for industry, agriculture, city water ...