發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Surface ablation of 52100 bearing steel using femtosecond laser irradiation