The feeding speed of shifting unit of welding machine is one of the most important factors of rail continuous flash welding quality.
影响钢轨闪光焊接头焊接质量的因素很多，其中焊机动力柱的送进速度就是重要因素之一。
The first UN-200 rail ac flash butt welding machine with patent was introduced.
介绍了国内首台拥有自主知识产权的UN - 200型钢轨交流闪光焊机。
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