热轧棒材和盘条表面质量等级交货技术条件
Surface quality classes for hot-rolled bars and rods technical delivery conditions

2012-05-11

Surface quality classes for hot-rolled bars and wire rod
热轧棒材和线材的表面质量等级

2018-05-18

Surface quality classes for hot-rolled bars and wire rod
热轧棒材和线材的表面质量等级

2018-08-02

Surface quality classes for hot-rolled bars and wire rod (ISO 9443:2018)
热轧棒材和线材的表面质量等级（ISO 9443-2018）

2018-11-01