發送短信 : Buckling failure of rectangular oil tank with corrugated wall

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