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