Reeling shutter spring steel strip(Rounding Edge)ParameterMaterial:50#,65MnFinished:Quenching/black/blueSpecification:Thickness:1.2mm,1.3mm,1.4mm,1.5mmWidth:30-270mmLength:3m,3.5m,4m,4.5m,5m,5.5m,6m(A ... ...
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