發送短信 : Influence of external post-tensioning on the behavior of long-span steel mega trusses

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