發送短信 : Quantitative evaluation of multi-rotor UAV propulsion system reliability

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