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Q641f-16c Pneumatic O-Type Floating Ball Valve Wcb Carbon Steel PTFE Seat Pn16 Flanged on-off Ball Valve for Water Gas Oil Chemical, Find Details and Price about Q641f-16c Ball Valve Floating Ball Valve from Q641f-16c Pneumatic O-Type Floating Ball Valve Wcb Carbon Steel PTFE Seat Pn16 Flanged on-off Ball Valve for Water Gas Oil Chemical - Derun Environmental Protection Technology (Tianjin) Co., Ltd.