说明: 1.本表所列国家铁路系指:美国一级铁路、苏联铁路、日本国营铁路、西德联邦铁路、英国不列颠铁路、法国国营铁路、印度国营铁路。美国全国有近四百个铁路公司,所谓一级铁路是指年收入在五百万美元以上的铁路公司所属之铁路。一级铁路公司约有67个,其铁路营业里程约占95％以上。苏联铁路全部归国家经营。英国除大不列颠 Explanation: 1. The national railways listed in this table refer to: US Class I railways, Soviet railways, Japan State Railways, West German Federal Railways, British British Railways, French State Railways, Indian National Railways. There are nearly 400 railway companies in the United States. The so-called Class I railways refer to the railroads of railway companies with annual revenues of more than five million US dollars. There are about 67 Class I railway companies and their railway operating mileage accounts for more than 95%. The Soviet railways are all owned by the state. Britain except Great Britain