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

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發送短信 : Practical 3D geographic routing for wireless sensor networks