steel grade

• 钢的等级,钢的牌号

steel grade的用法和样例：

例句

1. The grade standards for tomatoes have been based on such a method.
   番茄的等级标准的确定就是以这种方法为基础。
2. Our Tall Venice Boots are manufactured from premium grade sheepskin pelts.
   我们的高的威尼斯靴子被由高级的等级毛皮制造成。
3. The hypoeutectoid graphitized free cutting steel was proposed.
   具有亚共析组织的钢种其石墨化过程一直很难，因此该钢种开发的关键是促进其石墨化过程。