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China Hot Sale DN100 Pn16 Flange Centerline Butterfly Valve SS304 Butterfly Valve for Water Center Butterfly Valve with Handle, Find Details and Price about Butterfly Valve Flange Butterfly Valve from China Hot Sale DN100 Pn16 Flange Centerline Butterfly Valve SS304 Butterfly Valve for Water Center Butterfly Valve with Handle - Tianjin KXC Metal Products Co., Ltd