發送短信 : Plastic buckling of simply supported, polygonal mindlin plates

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