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日本国有铁道为了增强既有线路输送能力和加强与其它运输业的竞争能力,自1957年开始,进行现代化改造,经过三个五年计划(注:每个五年计划实际均为四年),共投资44,490亿日元,于1968年使特快旅客列车速度达到120公里/时,一般货物列车速度达75公里/时。随后执行财政重建计划,于1976年3月全面停止使用蒸汽机车(仅保留15台备用),实现了牵引动力的无烟化。二十年来由于采取了对旅客、货物减少的车站实行合理化经营,信号、
In order to enhance the capacity of existing lines and to enhance their competitiveness with other transport industries, the state-owned Japanese railways have been modernizing since 1957 and have undergone three five-year plans (Note: each of the five-year plans is actually four years old) A total investment of 44,490 billion yen, in 1968 to make Express passenger train speed of 120 km / h, the general cargo train speed of 75 km / h. The subsequent implementation of the fiscal reconstruction plan completely stopped the use of steam locomotives in March 1976 (retaining only 15 spares) and achieved smokeless traction power. In the past two decades, due to the reasonable operation of the stations where passengers and goods have been reduced, signals,