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Q41f-16c Manual O-Type Floating Ball Valve Wcb Carbon Steel PTFE Seat Pn16 Flanged on-off Ball Valve for Water Gas Oil Chemical Pipeline, Find Details and Price about Q41f-16c Ball Valve Floating Ball Valve from Q41f-16c Manual O-Type Floating Ball Valve Wcb Carbon Steel PTFE Seat Pn16 Flanged on-off Ball Valve for Water Gas Oil Chemical Pipeline - Derun Environmental Protection Technology (Tianjin) Co., Ltd.