cavityless casting

例句：

1. 1.The new machine uses cavityless casting to produce parts with high precision.
   这台新机器使用无腔铸造技术生产零件，精度高。
2. 2. In the traditional method, the mold is used for cavityless casting.
   在传统方法中，模具用于无腔铸造。
3. 3.This technique has greatly improved the efficiency of cavityless casting.
   这项技术大大提高了无腔铸造的效率。