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

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發送短信 : Cooling of liquid in a tube under rotation