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

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發送短信 : Visualization of counter-rotating streamwise vortices in a rectangular channel with one-sided wavy surface