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            ______   _    _     ______    ______  
  ____     /_   _// | |  | ||  /_   _//  /_   _// 
 |    \\    -| ||-  | |/\| ||   -| ||-   `-| |,-  
 | [] ||    _| ||_  |  /\  ||   _| ||_     | ||   
 |  __//   /_____// |_// \_||  /_____//    |_||   
 |_|`-`    `-----`  `-`   `-`  `-----`     `-`'   
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Text this: Piezoelectric cylindrical design for harvesting energy in multi-directional vibration source