1. 钢种：steel furnace 炼钢炉 | steel grade 钢种 | steel grit 钢粒
2. 钢号：steel checkered plate 花纹钢板 | steel grade 钢号 | steel sections 型钢
3. 钢的等级：钢的表面修整 steel conditioning | 钢的等级 steel grade | 钢的等级牌号 steel grade
4. 钢的等级牌号：钢的等级 steel grade | 钢的等级牌号 steel grade | 钢的屈服点 yield of steel