track pin

例句：

1. 1.The car was fitted with a track pin to improve its performance.
   这辆车安装了跟踪钉以提升其性能。
2. 2.The engineer used a track pin to fix the damaged part of the machine.
   工程师用一个跟踪钉来固定机器受损的部分。
3. 3. The police used a track pin to trace the thief's movements.
   警方使用一个跟踪钉来追踪小偷的行踪。