發送短信 : Simulation and analysis of surge protector circuit

  _  _     ______    ______   __   __    ____    
 | \| ||  /_   _//  /_   _//  \ \\/ //  |  _ \\  
 |  ' ||   -| ||-   `-| |,-    \ ` //   | |_| || 
 | .  ||   _| ||_     | ||      | ||    | .  //  
 |_|\_||  /_____//    |_||      |_||    |_|\_\\  
 `-` -`   `-----`     `-`'      `-`'    `-` --`