Railway system of the Soviet Union

524毫米）的铁路最早在英国和美国出现。这个轨距在1843年被俄罗斯帝国采用，因此通俗叫做沙俄轨距。沙俄帝国所辖区域一般都继承了这个轨距。苏联铁路（英语：Railway system of the Soviet Union）在1960年代把数值微调为了1,520 mm（苏联轨距、俄罗斯轨距）。 目前使用俄罗斯轨距的国家一般是前俄罗斯帝国

away. The position became known in 1957 outside the Soviet Union only after U-2 planes had identified the site by following railway lines in the Kazakh

teams were, however, very effective. One account estimates that from the Soviet Union alone: "one hundred thousand geographical maps were taken on ideological

be known as the “American System” took coherent shape in the years between 1816 and 1828 and were coherent with the “national” wing of the Republican party

last night became the first republic to break away from the Soviet Union, by proclaiming the restoration of its pre-war independence. The newly-elected parliament