波兰铁路近20年来,在发展机车车辆方面获得了较大成就。在这一时期的初期,铁路上只使用蒸汽机车,所以注意力集中在改进蒸汽机车的运用上。1946—1964年间蒸汽机车的日车公里如下:客运从180提高到318公里,货运从119提高到201公里。由于运营条件极为不同,故备有80余种系列的功率和结构不同的蒸汽机车。1945到1963年间,需要修理的蒸汽 In the past two decades, the Polish railway has made great achievements in the development of rolling stock. In the early days of this period, only steam locomotives were used on the railway, so attention was focused on improving the use of steam locomotives. The daily car kilometers for steam locomotives between 1946 and 1964 were as follows: Passenger traffic increased from 180 to 318 kilometers and freight traffic increased from 119 to 201 kilometers. Due to the extremely different operating conditions, there are more than 80 series of steam locomotives with different power and structure. 1945 to 1963, the need to repair the steam