發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Centrifugal pump performance subjected to severe off-design operations