freezer part;al fin evaporator,refrigerator part,al fin heat exchange rate the surface of special treatment,not ... :Copper tubeφ8mm,φ9mm,12.7mmAl foil Bare Al foil δ=0.15~0.25mmSide plate Al plate δ0.8~1.5mm. Key process:Tube ... , Tube expanding,Degreasing,Welding and assembling, Leakage test,Drying,Inspection,Packing Performance:(1) Surface anodic oxidization or dip coating to prevent ...