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D942h-10q DN1000 Double Eccentric Metal Seal Butterfly Valve/Flange Butterfly Valve/Manual Butterfly Valve, Find Details and Price about Valve Butterfly Valve from D942h-10q DN1000 Double Eccentric Metal Seal Butterfly Valve/Flange Butterfly Valve/Manual Butterfly Valve - Zhengzhou Top Valve Fluid Technology Co., Ltd.