Translation of "sleeper" into Chinese

A high density polyethylene railway sleeper

采用高密度聚乙烯研制的铁路轨道枕木

You're taking the sleeper today, then getting married tomorrow?

你 今天 乘 卧车 走 , 明天 就 结婚 ?

The progress in railway reconstruction, however, is slow, owing to the lack of steel strands for the production of concrete sleepers

铁路重建工作迟迟不前,因为缺少生产水泥轨枕所需的钢绳。