flange, stainless steel flange,bs flange,din flange,lap joint type flange,slip on flange,weld neck flange,valve flange,api flangeOur Main Products:flange,304 flange,316 flange,316L flange,304L flange, ...
Shanghai Shuanggao Valve Group Co., Ltd.
Main Products: trunnion mounted ball valve, pressure seal valve, full welded ball valve, through conduit gate valve... More