發送短信 : Stability analysis of construction machinery on various terrains

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