Torreon vs Arch

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Torreón (Spanish pronunciation: [toreˈon] (listen)) is a city and seat of Torreón Municipality in the Mexican state of Coahuila. As of 2015, the city's population was 679,288. The metropolitan population as of 2015 was 1,497,734, making it the ninth-biggest metropolitan area in the country and the largest metropolitan area in the state of Coahuila, as well as one of Mexico's most important economic and industrial centers. The cities of Torreón, Gómez Palacio, Lerdo, Matamoros, Francisco I. Madero, San Pedro, Bermejillo, and Tlahualilo form the area of La Laguna or the Comarca Lagunera, a basin within the Chihuahuan Desert. The area was originally a center for ranching.

With irrigation, the city became an important center for farming and the processing of cotton. In the middle of the 20th century, it became an industrial city. The city has industries in textiles, clothing and metals processing. Some important industries and companies have business here, like Peñoles, Motores John Deere, Grupo Lala, Yura Corporation, as well as stores like Soriana, Cimaco, and Extra. There are also several shopping malls in the city, including Galerias Laguna, Almanara, Plaza Cuatro Caminos, and InterMall. Torreón is served by Francisco Sarabia International Airport, an airport with flights to several cities in Mexico and the United States.

Source: Wikipedia

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An arch is a vertical curved structure that spans an elevated space and may or may not support the weight above it, or in case of a horizontal arch like an arch dam, the hydrostatic pressure against it. Arches may be synonymous with vaults, but a vault may be distinguished as a continuous arch forming a roof.

Arches appeared as early as the 2nd millennium BC in Mesopotamian brick architecture, and their systematic use started with the ancient Romans, who were the first to apply the technique to a wide range of structures.

Source: Wikipedia