... match with circulating cooling SHZ-95B High Efficient Big Power Water Ring Vacuum Pump SHZ-95B Multifunction Water Circulated ... , crystallization, drying, filtration,sublimation experiments for gas bleeding(sucking the gas out), it is one necessary laboratory equipment used ... resistant, non-polluting, stable operation, long life. Main engine has polypropylene and stainless steel two models. The control ...