双面埋弧焊螺旋钢管（SSAW），执行 GB/T 9711、GB/T 3091、SY/T 5037 及 API 5L 标准。适用于给水与排水、石油天然气输送、桩基及结构用途。口径范围…
Large diameter spiral welded pipe for piling, bridge and structural use, as well as low-pr…
