vacuum melt

例句：

1. 1.The vacuum melting process is crucial for the quality of the final product.
   真空熔炼过程对于最终产品的质量至关重要。
2. 2. During the vacuum melting process, the material is heated and transformed into a new form.
   在真空熔炼过程中，材料被加热并转化为一种新的形式。
3. 3. The vacuum melting process has been used in many industries to improve efficiency and reduce waste.
   真空熔炼工艺已被广泛应用于许多行业，以提高效率并减少浪费。