發送短信 : A study towards improving mechanical properties of sol–gel coatings for polycarbonate

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