normal steel

例句：

1. 1. The construction of the bridge required the use of normal steel for its structural integrity.
   建造这座桥需要使用正常钢来保持其结构完整性。
2. 2. The car's engine is made from high-quality normal steel to ensure durability and reliability.
   汽车的发动机是由高质量的正常钢制成的，以确保耐用性和可靠性。
3. 3. The manufacturer claims that their normal steel products meet the highest standards of quality and safety.
   制造商声称他们的正常钢产品符合最高的质量标准和安全标准。