cluster casting

例句：

1. 1. The process of cluster casting is used to produce complex shapes in metal.
   集群铸造工艺用于制造金属的复杂形状。
2. 2. In the cluster casting process, molten metal is poured into a mold and allowed to solidify.
   在集群铸造过程中，熔化的金属被倒入模具中并让其凝固。
3. 3. The cluster casting technique has been shown to be more efficient than traditional casting methods.
   集群铸造技术已被证明比传统铸造方法更高效。