In Site Testing of Continuous Welded Turnout
gu ai jun; fan jun jie; jiang wei li (college of civil engineering and architecture; northern jiaotong university; beijing 100044; china)
Study on the Trapping Efficiency of Particulate Filter
ning zhi 1; lu yong 2 (1.college of mechanical engineering; 2.college of electronic and information engineering; northern jiaotong university; beijing 100044; china)