Lightweight wheels can reduce weight about 100kg for commercial vehicles,and it can save energy and reduce emission,what......

介绍了采用K190П K焊机焊接包钢60 kg/mPD3钢轨的工艺试验结果,分析了PD3钢轨的焊接与正火工艺特点,提出了稳定钢轨焊接质量的工......