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DN50 DN300 DN400 DN1000 Stainless Steel Wcb Cast Iron Carbon Steel Ductile EPDM Lug Type Wafer Butterfly Valve, Find Details and Price about DN50 DN100 Lug Wafer Butterfly Valve DN150 Di Ductile Iron Lug Wafer Butterfly Valve from DN50 DN300 DN400 DN1000 Stainless Steel Wcb Cast Iron Carbon Steel Ductile EPDM Lug Type Wafer Butterfly Valve - Hebei Peng Guang Valve Trade Co., Ltd.