發送短信 : Test and design of built-up stainless steel stub columns

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