分动外锁道岔较普通道岔具有较大的优越性１９９６年１月１７日，南京地区下了１９８４年以来最大的一场雪，雪厚达１５ｃｍ。为保证设备正常运行，南京铁路分局各单位积极组织扫雪。在宁东地区到达场，开始时（１２点），一人扫一组双动道岔，先扫第一动再扫第二动。但扫... On the 17th of January, 1996, Nanjing City recorded the largest snowfall in 1984 with a snow thickness of 15cm. In order to ensure the normal operation of equipment, Nanjing Railway Branch units actively organize snow removal. Arrived at the field in Ningdong area, the beginning (12 o’clock), one sweep a group of double-action turnout, first swept the first move then sweep the second move. But sweeping ...