1前它近10年来，铁路为缓和全国经济迅速发年后日益紧张的运能与运量之间的矛盾，除了力快新线建设外，在牵引动力方面也不断向大自率机车更新，其中发展最快的各型内燃机车，至1993年底全路共有8000余台，完成运量占全路运量60％以上。内燃机车具有功率大、运用效率高等优点但 In the past 10 years, as a railway station, to ease the contradiction between the increasingly tight transport capacity and transportation capacity after the rapid national economic development, in addition to building a new line of rapid construction, the railway has continuously renewed its efforts in locomotive traction. Among them, the fastest growing diesel locomotives of various types have a total of more than 8,000 units by the end of 1993 and have completed more than 60% of the total freight volume. However, diesel locomotives have the advantages of high power consumption and high utilization efficiency