發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Traction characteristics of a rolling element bearing under rapid acceleration and implications for auxiliary operation in magnetic bearing systems