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

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