Underground railroad.

• Autores: Anna Kuchment
• Localización: Scientific American, ISSN 0036-8733, Vol. 305, Nº. 1, 2011, págs. 62-63
• Idioma: inglés
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• Resumen

  • The article discusses the construction of a subway line in New York City, called the T line, which is the first new subway line since the 1940s, and the tunnel-boring machine (TBM) used to cut through the city's bedrock.