hardened-steel bushing

例句：

1. 1.The machine was designed to fit perfectly intothe hardened steel bushing.
   这台机器设计得可以完美地适配到硬化钢套筒中。
2. 2. The engineerused a special tool toremove the hardened steel bushing from the machine.
   工程师使用特殊的工具将硬化钢套筒从机器中取出。
3. 3. The hardened steel bushing iscrucial for maintaining the smooth operation of themachine.
   硬化钢套筒对于保持机器的平稳运行至关重要。