أرسل هذا في رسالة قصيرة: Dynamic response of tower crane induced by the pendulum motion of the payload

             ___               __   __   _    _   
    ___     / _ \\    ____     \ \\/ // | || | || 
   /   ||  | / \ ||  |    \\    \ ` //  | || | || 
  | [] ||  | \_/ ||  | [] ||     | ||   | \\_/ || 
   \__ ||   \___//   |  __//     |_||    \____//  
    -|_||   `---`    |_|`-`      `-`'     `---`   
     `-`             `-`