Established in 1985, Shuanggao Valve Co., Ltd. was reorganized to Shanghai Shuanggao Valve (Group) Co., Ltd. (SGOV) in 1999, integrating design, production, examination and sale into a whole in the field of valve industry. SGOV is a high and new
trunnion mounted ball valve, pressure seal valve, full welded ball valve, through conduit gate valve, electric...
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