air heat exchanger copper tube:Dia.7mm, ... 7.94mm,9mm,9.52mm,etc hydrophilic fin or bare fin louver,flat or corrugated fin type air heat exchanger ... or flat fin or corrugated fin4.copper tube: diameter 7mm,7.94mm,9mm,9. ... tube bending, punching fin, expanding, digressing, dryingWelding, leakage test, bending, inspection, packingNote: for further information please contact us air heat exchanger ...