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D641X-16qp 4inc Durable Flange EPDM SS304 Pneumatic Butterfly Valve for Industry, Find Details and Price about Pneumatic Butterfly Valve Flange Butterfly Valve from D641X-16qp 4inc Durable Flange EPDM SS304 Pneumatic Butterfly Valve for Industry - Fudesheng (Jiangsu) Automatic Control Valve Manufacturing Co., Ltd