發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : A new design and computer simulation of a 5-electrode ion extraction/focusing system