1.aluninium fin type Integrated design for pre-cooling, 2.frog-removing ,water-separating type 3.compact less ... lose evaporator Integrated design for pre-cooling ,evaporation, frog-removing and water-separating ,compact and ... of air compressor such as intercooler &after cooler in piston compressor, oil cooler or after cooler in slip compressor, oil-free air compressor ...