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回顾了大同机车厂由蒸汽机车转产电力机车的发展历程，重点介绍了ＳＳ７型电力机车的开发研制，提出了大同机车厂生产发展的近期设想。
Reviewing the development history of Datong Locomotive Works from electric steam locomotive to electric locomotive, focusing on the development of SS7 electric locomotive and putting forward the recent assumptions on the production and development of Datong Locomotive Works.