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CCA (copper clad aluminum) tube is one kind of new tube that developed by Unidus based on ACC tube, the copper-aluminum interface is form of metal bonding between Cu and AI atoms. The tube has an outer layer of oxygen-free copper and inner layer of antirust 3003 aluminum, widely applied in insolated connection pipe, tubing, refrigeration industry, vaporize tube of water heater, inner conductor of RF coaxial cable and so on. Comparing with copper tube in same specification, this tube can save more than 40% purchase cost for customers and here are not so many differences in production process be