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Leyon FM UL Grooved Pipe Fitting Fire Fighting Pipes Fire Protection System Esfr K5.6 K8 K252 K363 68c Sprinkler Head, Find Details and Price about FM UL Fire Fighting Pipes Fire Protection System Sprinkler Head from Leyon FM UL Grooved Pipe Fitting Fire Fighting Pipes Fire Protection System Esfr K5.6 K8 K252 K363 68c Sprinkler Head - Leyon Piping System Co., Ltd