Describir: The theory and design of structures ..

  _  _    _    _                ___      ______   _    _     _____      ___    
 | \| || | || | ||     ___     / _ \\   /_   _// | || | ||  / ____||   / _ \\  
 |  ' || | || | ||    /   ||  / //\ \\    | ||   | || | || / //---`'  / //\ \\ 
 | .  || | \\_/ ||   | [] || |  ___  ||  _| ||   | \\_/ || \ \\___   |  ___  ||
 |_|\_||  \____//     \__ || |_||  |_|| /__//     \____//   \_____|| |_||  |_||
 `-` -`    `---`       -|_|| `-`   `-`  `--`       `---`     `----`  `-`   `-` 
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