發送短信 : Progressive collapse of steel frames in fire

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