1. One rail is joined to the next by means of a metal, plate; space is left between them to allow for expansion. 
   用铁板把铁轨一根一根连接起来，它们中间留出空隙，作为膨胀的余地。
2. continuous welded rail track 
   无缝线路
3. expansion joint of rail 
   钢轨伸缩调节器
4. presensitized plate, wipe-on plate 
   预涂感光版现涂感光版
5. Goods transported by rail. 
   通过铁路运输的货物

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