我们供德标DIN2458钢管 我公司专业生产各种无缝钢管。热扩钢管。热轧钢管。螺旋钢管。ASTM美标钢管,DIN德标钢管,俄标钢管,钢管防腐,钢管保温,美标焊接钢管,美标无缝钢管,镀锌钢管,ERW钢管,厚壁无缝钢管,厚壁焊接钢管,并可根据用户需求制作特殊规格型号的钢管。ANSI B16.9管件,ANSI B16.5法兰.弯头,三通,弯管010-6730,7013仉先生1580127,1196 we are a big manuafacturer and exporter of seamless carbon/alloys steel pipe in china and especialloy specialized in processing the big outer diameter of carbon/alloy seamless steel pipes, such as ASTM A53/A53M-04, A106/A106M-04a, A135-01, A179/A |