發送短信 : Modeling of the movement and stress distribution of a line-shaped item in a vortex

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