發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : A differential GPS carrier phase technique for precision outdoor AR tracking