... ,20,30,50,80 20L Cooling Water Circulating Pump Features:•Side in the wind side exhaust, corner ... to renewal medium Application fields:1.Analytical instruments: Atomic absorption, mass spectrometer, XuanGuangYi 2.Medical equipment: cooling ... laser equipments: biological pharmacy 4.Scientific experiment equipments: molecular pump rotation evaporation meter, distillation, fermentation device, laser, ...