Abstract：This paper analyzes the cause of producing small concave around weld seam according to practice of welding long rail in Guangzhou Metro Line 2, and presents the preventable measure to overcome.
王欣，俞绍全. 接触焊钢轨焊缝热影响区轨面小凹痕的预防措施[J]. 铁道工程学报, 2004, 21(3): 9-11.
WANG Xin,YU Shao-quan. PREVENTABLE MEASURE OF SMALL CONCAVE AROUND CONTACT-WELD SEAM ON RAIL SURFACE. 铁道工程学报, 2004, 21(3): 9-11.
2004, Vol. 21 
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