Describir: Handbook of mechanical specifications for buildings and plants :

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