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Hebei Haihao GroupInternational Standard5251Stainless steel butt-welding fittingsAccessoiresa snuder hout a bout en acier inoxydableFirst edition -1981-04-15UDc621.643.411.4:669.14.018.8Ref.No.IS05251-1981(E76L890829Daseriptors:piping.accessories,steei tubes,pipe fittings,wolded tubes,pipe bends,designation,grade (quality),symbolo,dimonaions.dirursiunal tolerances,form tolerances,marking.ail:sales@haihaogroup.comwww.haiitabpfsing.com
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