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

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