發送短信 : Non-linear frequency-domain analysis of jack-up platforms

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