... resistance 4. match with circulating cooling SHZ-95B High Efficient Big Power Water Ring Vacuum Pump SHZ-95B Multifunction Water ... , high power, low noise,easy and flexible. This pump is widely used for evaporation, distillation, crystallization, drying, filtration,sublimation ... experiments for gas bleeding(sucking the gas out), it is one necessary laboratory equipment used for medical and health, ...