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HIGH-PRODUCTIVE CONTINUOUSLY OPERATING QUICK EVAPORATING APPARATUS BASED ON SLIDING FILM AND CIRCULATIONAL VACUUM METHODS SERVING FOR EVAPORATION HEAT-SENSIBLE MATERIALS IN LABORATORIAL OR SEMI-INDUSTRIAL CIRCUMSTANCES
HIGH-PRODUCTIVE CONTINUOUSLY OPERATING QUICK EVAPORATING APPARATUS BASED ON SLIDING FILM AND CIRCULATIONAL VACUUM METHODS SERVING FOR EVAPORATION HEAT-SENSIBLE MATERIALS IN LABORATORIAL OR SEMI-INDUSTRIAL CIRCUMSTANCES