前言　　 1999年，介休机务段完成了由蒸汽向内燃的彻底转型，配属内燃机车 6 3台，担当北京路局南同蒲线榆次—候马北间货物列车牵引任务。线路所在地为全国煤焦生产集散地，空气污染较严重，空气中粉尘较多，2 0 0 0年春季出现较严重沙尘暴气候。自元月开始，柴油机机油平均 Foreword In 1999, Jiexiu Locomotive Depot completed the complete transformation from steam to internal combustion and was equipped with 63 sets of diesel locomotives to serve as the cargo train towing task between Yuci-Shima North Railway Station in Tonglu District of Beijing. The location of the line is the national coal and gas production and distribution center, with more serious air pollution and more dust in the air. In the spring of 2000, there was a more serious dust storm. Since January, diesel engine oil has averaged