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304 lug butterfly valve (1) PTFE butterfly valve (1)     Knife gate valve (1)     slag discharge wear-resistant (1)     ceramic knife gate valve (1)     Electric (1)     hard sealed (1)     stainless steel butterfly valve (1)     Flange cast iron globe valve (1)     10K straight through (1)     JIS (1)     Gate valve (1)     soft sealed fluorine lined gate valve (1)     cast steel gate valve (1)     Spring type safety valve (1)     cast steel fully open (1)     exhaust pressure relief (1)     Umbrella gear (1)     large-diameter gate valve (1)     manual gate valve (1)     Turbine soft seal butterfly valve (1)     manual lining fluorine butterfly valve (1)