free-cutting steel

例句：

1. 1.This type of steel is ideal for cutting through concrete without damaging it.
   这种钢材非常适合切割混凝土而不损坏它。
2. 2. The construction company uses this free-cutting steel in their projects to save on costs.
   这家建筑公司使用这种自由切割钢在其项目中节省成本。
3. 3.The engineer used this free-cutting steel to make the machine more efficient.
   工程师使用这种自由切割钢使机器更加高效。