... . Cross-counter flow aluminiun core adopt high quality seawater corrosion resistant hydrophilic aluminum foil as heat conductor, process by special ... curring,corrugated undercut,the air tightness up to 99.9%.3. Module structure,different size of edges and superposed thickness ... of Channel, high fresh air and exhaust air bearing capability.3. Cross channel between ourdoor air and exhaust air, separate ...