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

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Text this: Effects of the source on wave propagation in pile integrity testing