發送短信 : Indentation and external pressure on subsea single wall pipe and pipe-in-pipe

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