ductile cast iron roll

例句：

1. 1.The rolling mill uses a ductilecast iron roll to shape the metal.
   轧钢厂使用可锻铸铁辊来成型金属。
2. 2.The engineer carefully selected the right ductile cast iron roll for the project.
   工程师仔细挑选了适合该项目的可锻铸铁辊。
3. 3. The ductile cast iron rollis essential for the smooth operation of themachine.
   可锻铸铁辊对于机器的平稳运行至关重要。