... δ=0.15~0.25mmSide plateAl plateδ0.8~1.5Applicationrefrigerator and ice boxKey processTube bending ,Punching the fins,Tube expanding,Degreasing,Welding ... and assembling,Leakage test,Drying,Inspection,PackingTechnical standardsSpecificatonHoles distanceExpansion abilityφ9. ...