發送短信 : Quantitative determination of stone fragmentation efficiency

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