... )standards :GB,JIS,ASTM and so on 3)materials :T8,T10,T12,T13,etc 4)diameter:4-400mm 1)round steel bar2 ... )standards :GB,JIS,ASTM and so on 3)materials :T8,T10,T12,T13,etc4)diameter:4-400mm5)best exporter TypeRound steel barStandardGB ... /ASTM/DIN/JIS and so onGradeT8,T10,T12,T13,etcDiameter4-400mmLength6m-12m or fixed as standardApplicationConstruction industry with ...