reversing shape mill

例句：

1. 1. Thismachine is designed to reverse the shape of metal parts.
   这台机器被设计用来反转金属部件的形状。
2. 2. The engineer used a reversed shape mill to improve the quality of the castings.
   工程师使用了一个倒转形状的磨床来提高铸件的质量。
3. 3.During the manufacturing process, the reversed shape mill was crucial for shaping the final product.
   在制造过程中，倒转形状的磨床对于成型最终产品至关重要。