The rail flash butt welding machines are widely used in continuous welded rai ltrack in our country, but they are mainly imported abroad.

• 我国主要依靠引进国外钢轨闪光焊机进行焊轨生产和无缝线路铺设施工,而具有全部自主知识产权的国产钢轨闪光焊机目前尚属空白。