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

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Text this: Lamb wave propagation in a metallic semi-infinite medium covered with piezoelectric layer