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SA179 Heat Exchanger Rifled Boiler Tube DIN17175 St45 Carbon Steel Pipe Seamless Boiler Tube, Find Details and Price about Carbon Steel Seamless Tube Carbon Steel Tube from SA179 Heat Exchanger Rifled Boiler Tube DIN17175 St45 Carbon Steel Pipe Seamless Boiler Tube - Wuxi Cheng Yue Metal Materials Co., Ltd