... Welded Conveying Pipe 焊接输送管 spiral welded steel pipe 螺旋焊接钢管 ; 螺旋烧焊钢管 ; 电钻铆接钢管 electric welded steel pipe 电焊钢管 ...
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High-Fgequency Electric Welded Steel Pipe 高频电焊钢管
Fgequency Electric Welded Steel Pipe 高频电焊钢管
Frequency Electric Welded Steel Pipe 高频电焊钢管
Electric-arc-welded steel-plate pipe 电弧焊钢板卷管
Electric-fusion-welded steel-plate pipe 电熔焊钢板卷管
electric-resistance welded steel pipe 电阻焊钢管
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