碳钢双头管外丝75长BSPT/NPT螺纹Sch40加厚20#A105天佑管业5154
碳钢双头管外丝100长BSPT/NPT螺纹Sch40加厚20#A105天佑管业5154
订做高压厚壁不锈钢弯头 SCH40S-SCH80S-SCHXXS高压无缝焊接弯头
生产供应高压厚壁SCH40S,SCH80,SCH160,SCHXXS无缝弯头(三通)
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