發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Orbital angular momentum transmission based on satellite formation relay in space communications