shaper rail

例句：

1. 1.The engineer was required to inspect the shaper rails before the bridge was completed.
   工程师被要求在桥梁完工前检查成形的轨道。
2. 2. The new railway line is expected to improve transportation and reduce travel time for passengers.
   新的铁路线预计将提高运输效率和减少乘客旅行时间。
3. 3.The construction of the new railway station has been delayed due to the unfinished shaper rails.
   由于未完成的成形轨道，新火车站的建设已被推迟。