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DN300 Pn25 K9 Di Outer Diameter 350mmx6m Length 6m 12m Ductile Iron Pipe, Find Details and Price about Ductile Iron Pipe K9 Ductile Iron Pipe from DN300 Pn25 K9 Di Outer Diameter 350mmx6m Length 6m 12m Ductile Iron Pipe - Shandong Hongqiao Energy Equipment Technology Co., Ltd.