... for householdKey processTube bending, Punching the fins, Tube expanding, Degreasing, Welding and assembling, Leakage test, Drying, (Bending), Inspection, PackingTechnical standardsSpecificationHoles distanceFin ... /Residual impurity≤ 30 / ( function(){ var aBigImageSrc = [ 'http://i00.i.aliimg.com/photo/v0/733635746_1/Copper_Tube_Aliminium_Fin_Type_Heat_Exchanger.jpg' , 'http://i00.i.aliimg ...