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  _  _    __   __    ______     ___     _    _   
 | \| ||  \ \\/ //  /_   _//   / _ \\  | |  | || 
 |  ' ||   \ ` //     | ||    | / \ || | |/\| || 
 | .  ||    | ||     _| ||    | \_/ || |  /\  || 
 |_|\_||    |_||    /__//      \___//  |_// \_|| 
 `-` -`     `-`'    `--`       `---`   `-`   `-`

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發送短信 : Investigation of push-pull boundary in supply chain