我国的社会主义建设事业蒸蒸日上,城乡物资交流与客流表现得特别繁忙,作为交通工具之一的762毫米轨距的窄轨铁路,在这方面已经显示了不可忽视的重要作用。湘粤豫三省(以上简称三省)就修了不少这样的铁路,效 The cause of socialist construction in our country is booming day by day. The materials exchange and passenger flow between urban and rural areas are particularly busy. As one of the means of transport, the narrow-gauge railway with a gauge of 762 mm has shown an important role that can not be neglected in this regard. Hunan, Guangdong and Henan provinces (hereinafter referred to as the three provinces) to repair a lot of such railways, efficiency