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

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發送短信 : Analysis of underground excavations in rocks