發送短信 : Composite structures in tension, compression, and shearing

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