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,,,,我公司是钢制管件生产企业,愿意通过我们的努力,为您提供优质的产品和周到的服务。生产执行标准：SH3409-96钢板制对焊管件,,,GB-T,12459-2005钢制对焊无缝管件,,,GB,T,13401-2005,钢板制对焊管件,,,SH,3408-1996钢制对焊无缝管件,,, ,工厂制造的锻轧制对焊管配件,,,GB,T,13401-2005,钢板制对焊管件,SH,3410锻钢制承插焊管件,ASME, -92承插焊和螺纹连接的锻造管件,,,,,GB-T,14626,锻钢制螺纹管件,SH,3406-1996,石油化工钢制管法兰,GB-T,14383-93锻钢制承插焊管件,,SH,3406-1996,石油化工钢制管法兰,,,hg20592——20635-97,ASME,, ,Welded,and,Seamless,Wrought,Steel,Pipe,,, ,,Forged,Fittings,,,Socked,-Welding,and,Threaded,,ASTM, ,,Factory-Made,Wrought,Buttwelding,Fittings,,,,,,MSS,SP97,,,MSS,SP75,,