發送短信 : Displacement and resonance behaviors of a piezoelectric diaphragm driven by a double-sided spiral electrode

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