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| | Rail gauge - Wikipedia, the free encyclopedia |
 | | Standard gauge was chosen for the first main-line railway, the LMR, by the British engineer George Stephenson, because it was already a de facto standard in the north of England where Stevenson had designed and built many tramlines and engines. |
 | | The two gauges were sufficiently close to allow inter-operation of trains, and in recent years they have both been adjusted to a common "Iberian gauge" (ancho ibérico in Spanish, bitola ibérica in Portuguese) of 1668 mm. |
 | | Iran to the west uses standard gauge, as does China to the east; to the south, Pakistan uses 1676 mm gauge, while to the north, the central Asian republics of Turkmenia, Uzbekistan, and Tajikistan use 1520 mm gauge. |
| en.wikipedia.org /wiki/Rail_gauge (2742 words) |
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