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Di Ductile Graphite Pipe Ductile Graphite Tube DN80mm DN2600mm Anti-Corrosion Coated K7 K8 K9 300 MPa Yield Ductile Iron Steel Pipe for Water Supplying, Find Details and Price about Ductile Iron Pipe Ductile Iron Pipe Fitting from Di Ductile Graphite Pipe Ductile Graphite Tube DN80mm DN2600mm Anti-Corrosion Coated K7 K8 K9 300 MPa Yield Ductile Iron Steel Pipe for Water Supplying - Shandong Zhongtong Boda Steel Co., Ltd