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By certification 
Trademark : TASeries,GrSeries
Processing methods : Cold
Size Range（mm） : OD:6---116
Wall thickness:0.5---6.5
Length:500---14500
Implementation of standards : GB/T ASTM、ASME
Processing methods : Cold
Size Range（mm） : OD:6---116
Wall thickness:0.5---6.5
Length:500---14500
Implementation of standards : GB/T ASTM、ASME
