English: The map shows the implementation of the Soviet railway construction projects No 501 to 503. Additional are shown all railways lines that were planned or implemented before or after the No 501-503 lines.
Deutsch: Die Karte zeigt die Umsetzung der sowjetischen Eisenbahnbauprojekte Nr. 501 bis 503. Ergänzend sind alle Bahnlinien dargestellt, die zuvor oder danach geplant bzw. realisiert wurden.
Русский: На карте показана реализация проектов строительства советских железных дорог № 501–503. Дополнительно показаны все линии железных дорог, которые были запланированы или реализованы до или после линий № 501-503.
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