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

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發送短信 : EM fields inside a prolate spheroid due to a thin circular loop: A higher-order perturbation approach