Rust has corroded the steel rails.

锈侵蚀了钢。

This paper puts forward a new type of bolted anti-creepers, which changes the fixture mode of the dowelled anti-creeper.

提出了一种新型的螺栓式钢器，改变了穿销式器的紧固方式。

On the basis of the characters of HG - II myriametre rail welder and thetechnological request of rail gas pressure welding in the field, a ra.

根据新技术标准和施工工艺特点,在运专线铺基地建造了全自动的长钢焊接流水生产线,总结出了长钢接触焊的施工关键技术。