semi-steel

例句：

1. 1. The construction of the bridge was made possible by the use of semi-steel materials.
   桥梁的建设得益于使用半钢材料。
2. 2. In recent years, semi-steel has become a popular choice for building heavy machinery.
   近年来，半钢已成为建造重型机械的热门选择。
3. 3.The company specializes in producing semi-steel products for the automotive industry.
   该公司专门生产汽车工业所需的半钢产品。