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14 Series Double Eccentric Flange Butterfly Valve with High Quality DN800 Pn25 Water Oil Gas Ductile Iron Medium, Find Details and Price about Butterfly Valve Double Eccentric Flange from 14 Series Double Eccentric Flange Butterfly Valve with High Quality DN800 Pn25 Water Oil Gas Ductile Iron Medium - Yink Technology (Tianjin) Co., Ltd