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           _    _    _    _    _    _     _____   
  ____    | || | || | \  / || | || | ||  / ____|| 
 |    \\  | || | || |  \/  || | || | || / //---`' 
 | [] ||  | \\_/ || | .  . || | \\_/ || \ \\___   
 |  __//   \____//  |_|\/|_||  \____//   \_____|| 
 |_|`-`     `---`   `-`  `-`    `---`     `----`  
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發送短信 : Defining service quality in tramp shipping : conceptual model and empirical evidence