Describir: Nature and properties of engineering materials

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