fluted reamer

例句：

1. 1. This fluted reamer is ideal for cutting through concrete.
   这种缩管钻头非常适合切割混凝土。
2. 2. The engineer used a fluted reamer to remove the damaged part of the pipe.
   工程师使用一种缩管钻头来移除管道的损坏部分。
3. 3. The fluted reamer was designed to improve the accuracy of the drilling process.
   这种缩管钻头被设计用来提高钻孔过程的准确性。