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

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發送短信 : Two-dimensional filters and filter banks