13963639813 [email protected] 中國.山東省青州市中瑞鋼鐵物流園C北區13-14號
材質:10#,ASTM A179/ASME SA179, ASTM A192/ASME SA192,
外徑:19mm,25.4/25mm,33.4mm,38mm,42mm,48mm,57mm,60.3mm,73mm
材質:20#,16Mn/Q345B,Q345C,Q345D
外徑:19-1067mm
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