... Φ9.52/Φ7.94/Φ7Copper tube with aluminium finR407C≤1.9Used for industry and commerce air conditioning system8Φ ... to ensure the tightness.12.widely used in refrigeration industry, cold room and other cooling system.13. we ... tube bending, punching fin, expanding, digressing, dryingWelding, leakage test, bending, inspection, packingNote: for further information please contact us copper tube heat exchanger ...