half-round reamer

例句：

1. 1. This tool is used to shape the surface of metal parts.
   这个工具用于金属零件的表面成型。
2. 2. The engineer needs a half-round reamer to remove small burrs from the workpiece.
   工程师需要一把半圆锉刀来去除工件上的小毛刺。
3. 3.The half-round reamer was designed for precision cutting and shaping.
   这种半圆锉刀设计用于精密切割和成型。