high-grade carbon steel

例句：

1. 1. This high-grade carbon steel is used in themanufacturing of heavy machinery.
   这种高等级碳钢用于制造重型机械。
2. 2. The car's body is madeof high-grade carbon steel, which makes it durable and strong.
   这辆车的车身是由高等级碳钢制成的，这使得它既耐用又坚固。
3. 3.The construction of the bridge was made withhigh-grade carbon steel, ensuring itslongevity and resistance to corrosion.
   这座桥梁的建设使用了高等级碳钢，确保了其持久性和抗腐蚀性。