heat-treated track pin

例句：

1. 1.The engineer used a heat-treated track pin to fix the broken rails.
   工程师使用热处理轨道销来固定断裂的铁轨。
2. 2. The train was equipped with heat-treated track pins for safety reasons.
   为了安全原因，火车配备了热处理轨道销。
3. 3.The construction crew used heat-treated track pins to reinforce the bridge supports.
   施工队使用热处理轨道销加固桥梁支撑。