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Epoxy Resin Coating Manual Worm Gear Flange Metal Seat DN100 4inch 400 Degree C Three Eccentric Butterfly Valve, Find Details and Price about Butterfly Valve Three Eccentric Valve from Epoxy Resin Coating Manual Worm Gear Flange Metal Seat DN100 4inch 400 Degree C Three Eccentric Butterfly Valve - Sunfair Fluid Control Co., Ltd