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.

根据新技术标准艺特点,在客运专线铺轨基建造了全自动的长钢轨焊接产线,总结出了长钢轨闪光接触焊的关键技术。