... evaporation. 3 compact structure design in base,lifting device,water channel,etc. 4 stably ascend and descend:no noise 5 bath ... :rotary button typeFlask capacity:0.25-2L Lifting device:seasaw type push button, automatically lift and lower,travel distance 150mmConstitution: ... ,for water bath and oil bath Cooling device: horizontal type,double return integrated spherical neck condenser,which is made of ...