[Class : 11] Apparatus For Heating, Heat Recovering, Cooling, Refrigeration, Ventilation, Boiling, Cooking., Steam Generation, Concentration, Drying, Pasteurisation, Distillation, Sterilisation, Disinfection And Desalination: Plate Heat Exchangers, Spiral Heat Exchangers, Shell And Tube Heat Exchangers, Air Cooling Heat Exchangers As Well As Other Types Of Heat Exchangers: F...