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Fire Fighting System DN100 EPDM Coated Disc Industrial Manual Grooved Butterfly Valve/Solenoid Valve/Ball Valve/Control Valve, Find Details and Price about Valve Groove Butterfly Valve from Fire Fighting System DN100 EPDM Coated Disc Industrial Manual Grooved Butterfly Valve/Solenoid Valve/Ball Valve/Control Valve - Tianjin Ots Valve Manufacturing Co., Ltd.