أرسل هذا في رسالة قصيرة: VIBRATION OF THICK AND SANDWICH PLATES

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