發送短信

數:

提供者:

CAPTCHA:

  ______   _    _     ______     ___      _  _   
 /_   _// | || | ||  /_   _//   / _ \\   | \| || 
 `-| |,-  | || | ||  `-| |,-   / //\ \\  |  ' || 
   | ||   | \\_/ ||    | ||   |  ___  || | .  || 
   |_||    \____//     |_||   |_||  |_|| |_|\_|| 
   `-`'     `---`      `-`'   `-`   `-`  `-` -`

Please enter what you see:

發送短信 : Surge/ stall study on the compressor of a mini jet engine