shaft of a hammer

例句：

1. 1. The car's engine has a long shaft.
   这辆车的发动机有一个很长的轴。
2. 2. The machine tool uses a steel shaft to drive the cutting tool.
   这台机床使用一根钢轴来驱动切削工具。
3. 3. The scientist used a metal shaft to measure the length of the beam.
   科学家用一根金属轴来测量梁的长度。