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

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發送短信 : PCB layout design consideration for high speed digital application