pivot bearing of bridge

例句：

1. 1.The pivot bearing is located at the center of the machine.
   支点轴承位于机器的中心。
2. 2. The engineer carefully inspected the pivot bearing before starting the project.
   工程师在开始项目之前仔细检查了支点轴承。
3. 3. The pivot bearing was damaged during the accident, which caused the machine to stop working.
   事故中支点轴承损坏，导致机器停止工作。