PURPOSES Automatic development of color film,expansion of photographs film,micro-film,cinefilm and etc. Used in beverage vending machine. Stiching liquid attempering,Quantiatative replenishment of food additive. The etching and cleaning of acid,and alkali for water treatment,the utilization of condensating separation agent. The neutralization of acid and alkali for water treatment, the utilization of condensating separation agent. Quantitatives supply of electroplate liquid. Widely used in priming of additive,bleaching liquid and medical ration ejection.