preform forging

例句：

1. 1. The engineer preformed a new design for the machine.
   工程师为机器设计了一个新的模型。
2. 2. The forging process is crucial to the quality of the finished product.
   锻造过程对于成品的质量至关重要。
3. 3. The company specializes in high-quality metal castings.
   该公司专门生产高质量的金属铸件。