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 /_   _//  /_   _//  / ____||  |  ___||   ____    
 `-| |,-    -| ||-  / //---`'  | ||__    |    \\  
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   |_||    /_____//  \_____||  |_____||  |  __//  
   `-`'    `-----`    `----`   `-----`   |_|`-`   
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發送短信 : Effect of porosity on residual stress of 2024-aluminum GTAW specimen