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Corrosion-Resistant Stainless Steel Flange Butterfly Valve with Worm Gear Mechanism and High Temperature and Corrosion, Find Details and Price about Valve Worm Gear Butterfly Valve from Corrosion-Resistant Stainless Steel Flange Butterfly Valve with Worm Gear Mechanism and High Temperature and Corrosion - Funagan (Tianjin) Valve Co., Ltd.