This paper introduces the change of microstructure and properties of the rolled rail steel of CC bloom in hot charging. 文章主要介绍了采用钢轨钢连铸坯热送热装工艺生产钢轨组织的变化和所能达到的各项性能指标。
She was lost in a maze of railway lines. 她在纵横交错的铁轨前面迷失了方向。
Passengers must not walk on the railway line. 旅客不准在铁轨上走。