發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Investigate the use of electrostatics in fabricating 3D objects according to the principles of additive manufacturing technology