發送短信 : Tests on RC continuous beams with openings

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