graphite wedge

例句：

1. 1. The graphite wedge is used to make the machine run smoothly.
   石墨楔用于使机器运行顺畅。
2. 2.The graphite wedge was a crucial component in the construction of the bridge.
   石墨楔是建造桥梁的关键部件。
3. 3.The graphite wedge was used to prevent the wheel from slipping on the ice.
   石墨楔被用来防止车轮在冰上打滑。