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Fire Fighting UL FM Approved Ductile Iron Valves Manufacture 2"-12 Flanged X Grooved OS&Y Gate Valve, Find Details and Price about Ductile Iron Valves Gate Valve from Fire Fighting UL FM Approved Ductile Iron Valves Manufacture 2"-12 Flanged X Grooved OS&Y Gate Valve - Leyon Piping System Co., Ltd