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

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發送短信 : Design catalogs: a practical approach to design and value flexibility in engineering systems