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Ggg40/50 Body and Stainless Steel Disc EPDM+Surfacing304 Seal Double Eccentric Butterfly Valve, Find Details and Price about Valve Butterfly Valve from Ggg40/50 Body and Stainless Steel Disc EPDM+Surfacing304 Seal Double Eccentric Butterfly Valve - Tianjin Tanggu General Valve Group Co., Ltd.