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Leyon FM UL Fire Fighting Pipes Fire Protection System Fire Sprinkler System Cast Iron Valves Flange Grooved Butterfly Valve, Find Details and Price about Butterfly Valve Flange Grooved Butterfly Valve from Leyon FM UL Fire Fighting Pipes Fire Protection System Fire Sprinkler System Cast Iron Valves Flange Grooved Butterfly Valve - Leyon Piping System Co., Ltd