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99.9% Pure Copper Tube Thermal Conductivity Tube Sintered Heat Duct F8 Copper Thermal Conductivity Tube Large Heat Transfer, Find Details and Price about Copper Pipes Copper Pipes for Air Conditioners from 99.9% Pure Copper Tube Thermal Conductivity Tube Sintered Heat Duct F8 Copper Thermal Conductivity Tube Large Heat Transfer - Wuxi Kuaifa Steel Pipe Manufacturing Co., Ltd