發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : A new approach to power factor improvement at a 3-phase controlled rectifier at varying delay angles