The experiment of the gas pressure welding of carbon steel rail was carried out.
对碳钢钢轨气压焊进行了试验研究。
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。
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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