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Grooved End Connection Rubber Coated Disc Butterfly Valve with Worm Gear Hand Wheel/Gas Regulator/Solenoid Valve /Ball Valve/Solenoid Valves/Expansion Valve, Find Details and Price about Valve Groove Butterfly Valve from Grooved End Connection Rubber Coated Disc Butterfly Valve with Worm Gear Hand Wheel/Gas Regulator/Solenoid Valve /Ball Valve/Solenoid Valves/Expansion Valve - Tianjin Ots Valve Manufacturing Co., Ltd.